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Retinoscopy
l Pratyush Dhakal (Bsc Optometry,DOA)
l SENIOR COUNSULTANT OPTOMETRIST
Retinoscopy
Principle: To bring the far point of the patient to the peephole of retinoscope
Procedure
l Its a dark room procedure
l Sphere
l Astigmatism
l Stradding
Procedure
l Traditional
l Sphero cylinder
Reflexes
Speed and brightness: when aprroching near neutralization the speed of movement will be very fast and it will brighter too
Width of reflex: the width of reflex will be broader and broader when you are nearing to the neutral point
Types of Reflexes
l Red regular Reflexes
l Irregular reflexes
l Scissors reflexes
l No reflexes
Errors of Retinoscopyl Inaccurate WD
l Examiner sittiing angle is more than 5 degree from visual axis of the patient
l Accomdation
l Wrong axis
3 steps of retinoscopy
l Put working distance first
l Start with “with motion”
l Add power to neutralize
l Minus cylindrical form
+2.50
+3.00
-4.00
-1.00
For example(WD=50cm)
Final power:+1.0/-0.50x180 Final power:-6.00/-3.00x180
