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Problem with focusing light accurately on the retina due to the shape of the eye
Refractive error is a problem with focusing light accurately on the retina due to the shape of the eye and/or cornea. The most common types of refractive
Refractive_error
Type of eye defect
Astigmatism is a type of refractive error due to rotational asymmetry in the eye's refractive power. The lens and cornea of an eye without astigmatism
Astigmatism
Surgery to treat common vision disorders
Refractive surgery is an optional eye surgery used to improve the refractive state of the eye and thereby decrease or eliminate dependency on glasses or
Refractive_surgery
Failure of the brain to process input from one eye
type and severity of the strabismus. Refractive amblyopia may result from anisometropia (unequal refractive error between the two eyes). Anisometropia
Amblyopia
Physical phenomenon relating to the direction of waves
wavelengths. Refraction occurs when light goes through a water surface since water has a refractive index of 1.33 and air has a refractive index of about
Refraction
Inability to focus on distant objects
too long or less commonly the lens being too strong. It is a type of refractive error. Diagnosis is by the use of cycloplegics during eye examination. Myopia
Myopia
Series of tests assessing vision and pertaining to the eyes
eye. In an eye exam, the term refraction is the determination of the ideal correction of refractive error. Refractive error is an optical abnormality in
Eye_examination
Type of optical machine
automated refractor is a computer-controlled machine used during an eye examination to provide an objective measurement of a person's refractive error and prescription
Autorefractor
Technique to measure refractive error in eyes
Retinoscopy is a technique to obtain an objective measurement of the refractive error of a patient's eyes. The examiner uses a retinoscope to shine light
Retinoscopy
Decreased ability to see
impairment globally are uncorrected refractive errors (43%), cataracts (33%), and glaucoma (2%). Refractive errors include near-sightedness, far-sightedness
Visual_impairment
Eyes not aligning when looking at something
children with anisometropic amblyopia, a balancing of the refractive error eyes via refractive surgery has been performed before strabismus surgery was
Strabismus
Lenses placed on the eye's surface
lenses are designed to improve vision, most commonly by correcting refractive error. This is done by directly focusing light so it enters the eye with
Contact_lens
Ophthalmic testing device
contains different lenses used for refraction of the eye during sight testing, to measure an individual's refractive error and determine their eyeglass prescription
Phoropter
Clarity of vision
low visual acuity is refractive error (ametropia): errors in how the light is refracted in the eye. Causes of refractive errors include aberrations in
Visual_acuity
Eye condition in which light is focused behind instead of on the retina
It is a type of refractive error. Diagnosis is based on an eye exam. Management can occur with eyeglasses, contact lenses, or refractive corneal surgeries
Farsightedness
Corrective ophthalmological surgery
represent advances over radial keratotomy in the surgical treatment of refractive errors of vision. For people with moderate to high myopia or thin corneas
LASIK
Eye testing method
chart with the use of the pinhole, this indicates the presence of refractive error. This is based on the principle that the pinhole blocks out any peripheral
Subjective_refraction
Form of strabismus in which the eyes turn inward
amblyopia. Treatment options for esotropia include glasses to correct refractive errors (see accommodative esotropia below), the use of prisms, orthoptic
Esotropia
Perforated eyeglasses
confusion on the retina and increases depth of field. In eyes with refractive error, the result is often a sharper image. However, a second effect may
Pinhole_glasses
Term used when two eyes have unequal refractive power
Refractive surgery). A determination of the prevalence of anisometropia has several difficulties. First of all, the measurement of refractive error may
Anisometropia
Type of lens to improve visual perception
eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles"
Corrective_lens
Drooping of the upper eyelid over the eye
often observed. Ptosis can lead to various complications, including refractive errors. When ptosis obstructs the upper field of vision, affected individuals
Ptosis_(eyelid)
Difference in coloration, usually of the iris but also of hair or skin
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Heterochromia
Refractive eye surgery procedure
Retrieved 2018-01-24. "LASIK Alternatives | UCLA Laser Refractive Center". UCLA Laser Refractive Center. Retrieved 2018-01-29.[dead link] Zhao, LQ; Zhu
Photorefractive_keratectomy
Optical aberration
with eyeglasses, contact lenses, or refractive surgery. Various considerations involving ocular health, refractive status, and lifestyle frequently determine
Astigmatism_(optical_systems)
Degree to which an optical system converges or diverges light
An eye that has too much or too little refractive power to focus light onto the retina has a refractive error. A myopic eye has too much power so light
Optical_power
Inflammation of the eye
RA (April 2018). "Prevalence of Different Eye Diseases excluding Refractive Errors Presented at the Outpatient Clinic in Beheira Eye Hospital". The Egyptian
Conjunctivitis
Field of medicine treating eye disorders
Eye neoplasm Glaucoma Hypertensive retinopathy Macular degeneration Refractive error (including astigmatism) Strabismus Uveitis Following are examples of
Optometry
Medical condition
hypoglycemia, or low blood pressure. Other medical conditions may include refractive errors such as myopia, high hypermetropia, and astigmatism, amblyopia, presbyopia
Blurred_vision
Medical condition associated with aging of the eye
photorefractive keratectomy (PRK) are types of laser refractive surgeries used to correct refractive errors. Traditionally, one eye is corrected for distant
Presbyopia
Corrective contact lenses
gas-permeable contact lenses that temporarily reshape the cornea to reduce refractive errors such as myopia, hyperopia, and astigmatism. Doctors discovered the
Orthokeratology
Difference in the perceived size of eye images
induced by the correction of a refractive error, usually anisometropia (having significantly different refractive errors between each eye) or antimetropia
Aniseikonia
Clouding of the lens inside the eye, causing poor vision
the early stages, an increase in sclerosis may cause an increase in the refractive index of the lens. This causes a myopic shift (lenticular shift) that
Cataract
Group of eye diseases related to poor retinal and nerve perfusion
visually significant cataract: one-year results". Journal of Cataract and Refractive Surgery. 34 (3): 433–440. doi:10.1016/j.jcrs.2007.11.029. PMID 18299068
Glaucoma
Swelling of the eyelid due to infection of an oil gland
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Stye
Chart used to measure vision
if applicable. Often, the use of such refractive lenses will correct visual acuity to normal. Refractive error can be corrected using a pinhole occluder
Eye_chart
Gradual retinal degeneration leading to progressive sight loss
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Retinitis_pigmentosa
Pinkish, triangular tissue growth on the cornea of the eye
Video Journal of Cataract and Refractive Surgery. Volume XXII. Issue 3, 2006. Gulani AC (2006). "A New Concept for Refractive Surgery". Ophthalmology Management
Pterygium_(eye)
Ophthalmological testing tool
attained by lenses to correct errors of refraction. This can be used to distinguish visual defects caused by refractive error, which improve when the occluder
Pinhole_occluder
Medical condition involving the eye
the symptoms of keratoconus may be no different from those of any other refractive defect of the eye. As the disease progresses, vision deteriorates, sometimes
Keratoconus
Bulging of the eye anteriorly out of the orbit
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Exophthalmos
Farthest distance an eye can see
myopic eye, the far point is closer than 6 m. It depends upon the refractive error of the person's eye. For an unaccommodated hypermetropic eye, incident
Far_point
Dysfunction of eye movement
The horizontal gaze nystagmus test has been highly criticized and major errors in the testing methodology and analysis found. However, the validity of
Nystagmus
Vision-correction surgical technique
combinatorial vision-correction refractive surgical technique performed by ophthalmologists, in which refractive error of the eye is treated on both the
Bioptics_(surgery)
Tool used by eye care professionals
firstly selected and the patient's details are entered, including their refractive error. The analyser will provide a lens strength and type (either spherical
Humphrey visual field analyser
Humphrey_visual_field_analyser
Genetic disorder
bilateral and multifactorial than in children without Down syndrome. Refractive error is more common with Down syndrome, though the rate may not differ until
Down_syndrome
Abnormal intolerance to visual perception of light
remove the light source, or go into a dimmer lit room, such a one lit by refraction of light from outside the room. Alternatively, they may wear dark sunglasses
Photophobia
Clarity of near objects or letters
neurological disorders, or trauma to the eye. Hypermetropia, the most common refractive error in childhood, affects the near vision more than distant vision. To
Near_visual_acuity
Eye condition caused by ultraviolet radiation
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Photokeratitis
Quality of an image being out of focus
correction, and after refraction. This allows the optometrist or ophthalmologist ("eye doctor") to determine the extent refractive errors play in limiting
Defocus_aberration
Inflammation of the eyelid
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Blepharitis
Medical use of laser to cut tissues
laser-assisted lipectomy. Various types of laser surgery are used to treat refractive error. LASIK, in which a knife is used to cut a flap in the cornea, and a
Laser_surgery
Vision correction procedure
refractive surgeries (i.e. SMILE, LASIK, PRK, intraocular lens), and for patients who require correction of residual refractive error or refractive regression
PiXL
Vision loss due to damage to the macula of the eye
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Macular_degeneration
Deposits within the eye's vitreous humour
blue sky. Each floater can be measured by its size, shape, consistency, refractive index, and motility. They are also called muscae volitantes (Latin for
Floater
Medical condition
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Primary_congenital_glaucoma
used for 200 years to describe many different inventions to measure refractive error of the eye, has completely fallen out of usage today as the task of
Optometer (ophthalmic instrument)
Optometer_(ophthalmic_instrument)
Discomfort following extended visual tasks
factors, or underlying health conditions, including: Uncorrected refractive errors (astigmatism, hyperopia, anisometropia, etc.) Eye movement coordination
Eye_strain
Excessive dilation of the pupil
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Mydriasis
Removal of opacified lens from the eye
an IOL with different refractive power because of the placement further forward on the optical axis. The appropriate refractive power of the IOL is selected
Cataract_surgery
Lens implanted in the eye to treat cataracts and/or myopia or hyperopia
early stages of presbyopia) undergoing refractive lens exchange for the sake of correcting refractive errors. Monovision, in which one eye is made emmetropic
Intraocular_lens
Inflammation of the cornea of the eye
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Keratitis
Condition making it difficult or impossible to see in relatively low light
vitamin A, which is why a deficiency in vitamin A causes poor night vision. Refractive "vision correction" surgery (especially PRK with the complication of "haze")
Nyctalopia
Eye disorder found in prematurely-born babies
peripheral retina, and, possibly, reduced incidence of subsequent high refractive error. However, the safety of this new treatment has not yet been established
Retinopathy_of_prematurity
Medical condition
sensitivity may be affected. The change in the refractive index of the cornea may result in subtle refractive shifts, which affected individuals may experience
Fuchs'_dystrophy
Precision surgical instrument used instead of a laser in eye surgery
Ignacio Barraquer: The Father of Refractive Surgery". CRSTG | Europe Edition. Retrieved 2023-10-28. "Types of Refractive Errors | National Eye Institute". www
Microkeratome
Medical condition
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Achromatopsia
Type of corrective lens
part to advances in optometry which allow for better measurement of refractive error, so that glasses and contact lenses can be prescribed with different
Monocle
Most common genetic condition leading to color blindness
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Congenital red–green color blindness
Congenital_red–green_color_blindness
Loss of vision without any organic cause
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Functional_visual_loss
Corrective eye surgery
Clear lens extraction, also known as refractive lensectomy, custom lens replacement or refractive lens exchange is a surgical procedure in which clear
Clear_lens_extraction
Type of color vision
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Monochromacy
Decreased ability to see color or color differences
treatise of the nature of the humane mind and of its management for avoiding error in the sciences: vol I: done out of French from the last edition. p. 88
Color_blindness
Absence of the lens of the eye
like a lentil, e.g. a lens, via New Latin. Khurana, AK (2015). "Errors of refraction and accommodation". Comprehensive ophthalmology (6th ed.). Jaypee
Aphakia
Property in optics
and angle of refraction, respectively, of a ray crossing the interface between two media with refractive indices n1 and n2. The refractive indices also
Refractive_index
Excess folds of the conjunctiva of the eye
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Conjunctivochalasis
Inability to focus the eye due to ciliary muscle paralysis
indicated for use in cycloplegic refraction (to paralyze the ciliary muscle in order to determine the true refractive error of the eye) and the treatment
Cycloplegia
Diabetes-induced damage to the retina of the eye
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Diabetic_retinopathy
Medical condition of dry eyes
becomes worse after laser-assisted in situ keratomileusis (LASIK) and other refractive surgeries, in which the corneal nerves that stimulate tear secretion are
Dry_eye_syndrome
Medical condition from optic nerve damage
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Non-arteritic anterior ischemic optic neuropathy
Non-arteritic_anterior_ischemic_optic_neuropathy
Form of optical aberration
aberrations, diffraction and scatter. Correction of spherocylindrical refractive errors has been possible for nearly two centuries following Airy's development
Aberrations_of_the_eye
Visual aura associated with migraine
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Scintillating_scotoma
Altered region in an otherwise normal field of vision
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Scotoma
Excessive constriction of the pupil
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Miosis
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
James_C._Tsai
Double vision
MD (December 2007), "Monocular Diplopia Due To Spherocylindrical Refractive Errors", Trans Am Ophthalmol Soc., 105: 252–271, PMC 2258122, PMID 18427616
Diplopia
Lens implanted in eye in addition to the natural lens
intraocular lens that is implanted surgically into the eye to correct refractive errors without removing the natural lens (also known as "phakos", hence the
Phakic_intraocular_lens
Medical condition
is based on clinical evaluation demonstrating a discrepancy between refractive error measured under normal viewing conditions and that measured after relaxation
Pseudomyopia
Retinal disease caused by high amounts of triglycerides in the blood
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Lipaemia_retinalis
Medical condition
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Arteritic anterior ischemic optic neuropathy
Arteritic_anterior_ischemic_optic_neuropathy
Medical condition
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Vogt–Koyanagi–Harada_disease
Predicting the appropriate refractive power for a prosthetic lens implant
IOL calculation: A 1-mm error in AL measurement results in a refractive error of approximately 2.88 D or about 3.0-3.5 D error of IOL power in an average
Intraocular lens power calculation
Intraocular_lens_power_calculation
Medical condition
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Corneal_hydrops
Health condition negatively affecting the eye
3) Exotropia – the tendency for eyes to look outward H52 Disorders of refraction and accommodation (H52.0) Hypermetropia (Farsightedness) – the inability
Eye_disease
Medical condition
2008). "Global magnitude of visual impairment caused by uncorrected refractive errors in 2004". Bulletin of the World Health Organization. 86 (1): 63–70
Vision_disorder
Genetic form of macular degeneration
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Stargardt_disease
Type of color vision
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Dichromacy
Medical condition
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Graves'_ophthalmopathy
Unequal size of the eyes' pupils
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Anisocoria
Inflammation of the uvea of the eye
insufficiency Internuclear ophthalmoplegia One and a half syndrome Refraction Refractive error Hyperopia Myopia Astigmatism Anisometropia / Aniseikonia Presbyopia
Uveitis
REFRACTIVE ERROR
REFRACTIVE ERROR
Boy/Male
Indian, Punjabi, Sikh
One who is Aware and Reflective
Boy/Male
Shakespearean
The Comedy of Errors' A merchant.
Surname or Lastname
English
English : of uncertain derivation. The first recorded instance seems to be William Cleike (Yorkshire 1176), but this may well be an error for Clerke. In subsequent records the name is concentrated in Devon; it seems to have been originally a habitational name connected with a piece of land in the parish of Ermington near Plymouth, first recorded in 1278 as Clekeland(e), and still known as Clickland; the names John de Clakelond and Robert Cleaklond occur in this parish in 1332 and 1337 respectively. The place name may be from Old English cleaca ‘stepping stone’, ‘boundary stone’ (of Celtic origin) + land ‘territory’. Compare Clack.Americanized spelling of German Glück (see Gluck).
Boy/Male
Shakespearean
The Comedy of Errors' Twin brothers, both named Dromio, attendants on the twin Antipholuses....
Female
Hebrew
(×ֲבִיש×Ö·×’) Hebrew name ABIYSHAG means "my father is a wanderer" or "father of error." In the bible, this is the name of a young girl who cared for David in his old age. Also spelled Avishag.
Girl/Female
Indian
Goddess Aadisakti: She who Maintains the Rules of Justice without the Slightest Error
Boy/Male
Shakespearean
The Comedy of Errors' Father to the twin brothers Antipholus of Ephesus, and Antipholus of Syracuse.
Boy/Male
Shakespearean
The Comedy of Errors' Duke of Ephesus.
Female
Hebrew
(×ֲבִיש×Ö·×’) Variant spelling of Hebrew Abiyshag, AVISHAG means "my father is a wanderer" or "father of error." In the bible, this is the name of a young girl who cared for David in his old age.Â
Girl/Female
Shakespearean
The Comedy of Errors' Adriana's servant.
Boy/Male
Shakespearean
The Comedy of Errors' A merchant of Syracuse.
Boy/Male
Shakespearean
The Comedy of Errors' Twin brothers, both named Antipholus, sons to Aemelia and Aegion....
Female
English
Anglicized form of Hebrew Abiyshag, ABISHAG means "my father is a wanderer" or "father of error." In the bible, this is the name of a young girl who cared for David in his old age.Â
Boy/Male
Tamil
Errorless
Boy/Male
Shakespearean
The Comedy of Errors' A schoolmaster.
Girl/Female
Hindu, Indian
Without Error
Female
Arthurian
, error for Nineve (q.v.).
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi
Error-less
Boy/Male
Hindu
Errorless
REFRACTIVE ERROR
REFRACTIVE ERROR
Girl/Female
Tamil
The river Ganga
Female
Hebrew
(דִּיתָה) Pet form of Hebrew Yehuwdiyth, DITA means "Jewess" or "praised." Compare with another form of Dita.
Male
English
English unisex form of Norman French Josce, JOYCE means "lord." In the Middle Ages, this was a masculine name, now it is almost strictly feminine.Â
Biblical
to sustain, hold or lift up
Boy/Male
Hindu
Calm
Boy/Male
Indian
The first people who converted to the religion of Islam were the people of Ansar
Boy/Male
Arabic, Australian, German
Alternative of God
Girl/Female
American, British, English
Watchful; Vigilant; A Phonetic Form of the Initials Kc; Similar to the Irish Name Casey; Alert; Vigorous
Girl/Female
Hindu, Indian
Universal Knowledge
Girl/Female
Muslim/Islamic
Right guidance
REFRACTIVE ERROR
REFRACTIVE ERROR
REFRACTIVE ERROR
REFRACTIVE ERROR
REFRACTIVE ERROR
n.
That which retracts, or withdraws.
a.
Capable of exercising thought or judgment; as, reflective reason.
a.
Serving or having power to refract, or turn from a direct course; pertaining to refraction; as, refractive surfaces; refractive powers.
a.
Capable of being retracted; retractile.
a.
Capable of retraction; capable of being drawn back or up; as, the claws of a cat are retractile.
a.
Serving to retract; of the nature of a retraction.
n.
The correction which is to be deducted from the apparent altitude of a heavenly body on account of atmospheric refraction, in order to obtain the true altitude.
a.
Not reflective.
a.
Addicted to introspective or meditative habits; as, a reflective person.
adv.
In a retroactive manner.
n.
The act of refracting, or the state of being refracted.
n.
A refracting telescope, in which the image to be viewed is formed by the refraction of light in passing through a convex lens.
n.
The quality of being detractive.
n.
The change in the direction of a ray of light, and, consequently, in the apparent position of a heavenly body from which it emanates, arising from its passage through the earth's atmosphere; -- hence distinguished as atmospheric refraction, or astronomical refraction.
a.
Pertaining to, or possessing, refringency; refractive; refracting; as, a refringent prism of spar.
a.
Of or pertaining to dioptrics; assisting vision by means of the refraction of light; refractive; as, the dioptric system; a dioptric glass or telescope.
a.
Serving or tending to refract; as, a refracting medium.
a.
Throwing back images; as, a reflective mirror.
a.
Not retractile.
n.
The quality or condition of being refractive.