Chapter 16: Clinical Refraction

Question 1

In retinoscopy, the patients right eye should be examined by which eye of the examiner

Answer 1

Right eye. Like for like.
This is so that the other eye is free to look at a distant point and avoid accommodation.
If the patient is facing the doctor directly, due to examining patients right eye with doctors left eye, they will accommodate for near vision

Question 2

In retinoscopy, what does scissoring signify

Answer 2

Commonly occurs when dilated pupils are reaching their end point of retinoscopy.
Happens when one area is relatively myopic compared to the other.

Question 3

What is seen in the retinoscopy of a patient with keratoconus?

Answer 3

Swirling reflex. NB neutralisation is impossible and subjective testing is relied upon

Question 4

In subjective refraction, what is the most common reason patients ask for a retest?

Answer 4

Too strong a near add has been used

Question 5

Using a Maddox rod, orthophoria for distance and exophoria for near indicates?

Answer 5

Convergence insufficiency.

Question 6

What are the symptoms of convergence insufficiencies? How can we correct this?

Answer 6

Headache and eye straining. Can train the eye to correct this

Question 7

In order to get accurate retinoscopy for a child, what must you do?

Answer 7

Use cycloplegics

Question 8

True or false high myopics are for correction is often not tolerated.

Answer 8

True, they are often left with one or two uncorrected dioptres