retinoscopy
Pupil light test
Retinoscopy is an eye examination technique where light is shone into the pupil and the reflection observed as lenses of different powers are placed before the eye.
The movement of the light reflex reveals refractive errors—nearsightedness, farsightedness, astigmatism—allowing the examiner to determine a corrective prescription, often before the patient says a word.
procedure
Wave bending between media
- neutralizationCanceling opposing forces
- working distanceLens-to-subject gap
- interceptSeize en route
- sweepBrush clean with broom
refractive-errors
Blurry distance vision
- hyperopiaDifficulty seeing nearby objects
- astigmatismIrregular corneal curvature disorder
- presbyopiaAge-related near vision loss
- axisRotation reference line
diopter · eyeglasses · spectacles · contact lenses · prescription
clinical-application
Initial eligibility check
- disability assessmentReview of functional limitations
- intellectual disabilityImpaired reasoning and adaptive skills
- cognitive impairmentDiminished intellectual function
- developmental delaySlower-than-typical milestone achievement
instrumentation
Flat reflective surface
- concave mirrorInward-curved reflecting surface
- light sourceWhat gives off illumination
- peepholeDoor-mounted viewing lens
- sleeveGarment's arm portion
refraction
Wave bending between media
- neutralizationCanceling opposing forces
- working distanceLens-to-subject gap
- interceptSeize en route
myopia
Blurry distance vision
- hyperopiaDifficulty seeing nearby objects
- astigmatismIrregular corneal curvature disorder
- presbyopiaAge-related near vision loss
axis · diopter · eyeglasses · spectacles · contact lenses · prescription
prescreening
Initial eligibility check
- disability assessmentReview of functional limitations
- intellectual disabilityImpaired reasoning and adaptive skills
- cognitive impairmentDiminished intellectual function
plane mirror
Flat reflective surface
- concave mirrorInward-curved reflecting surface
- light sourceWhat gives off illumination
- peepholeDoor-mounted viewing lens
vergence
Opposite eye movements together
- focal lengthLens-to-convergence-point distance
- visionsharp, eye, visual perception, sight, eyes
- eye careeye doctor, ophthalmologist, eye exam, glasses, contacts
- Eye Exameye exam, vision test, glasses, glasses prescription, contacts
- optometryeye exams, eye care, eye doctor, glasses, contact lenses
- eye testseye exam, eye chart, vision test, eye test, eye tests
- eye examseye chart, visual acuity test, refraction, vision test, eye test