Instruments

Question 1

What are Teller and Keeler cards

Answer 1

preferential looking cards containing gratings. Suitable for 0 to 2 years

Question 2

What are Cardiff cards?

Answer 2

Cardiff cards are preferential looking cards, which contain simplistic images in light-grey (e.g. a duck) at one end of a grey card. Preferential looking cards are useful for 0 months to 2 years.

Question 3

What are the Kay, Sheridan-Gardiner, Songksen and Keeler logMAR tests

Answer 3

contain pictures and/or letter optotypes for matching or naming in single or crowded optotypes (good for 2+ years for Kay and 2-3+ years for other options

Question 4

Which children’s acuity test uses crowded letters?

Answer 4

Sonksen-Silver

Question 5

Name four tests for stereopsis

Answer 5

The Lang test uses built-in cylindrical elements to create a 3-dimensional image for measuring stereopsis (1200 - 600 seconds).

The Frisby uses a glass plate to measure stereopsis and therefore does not require special glasses to be worn either.

TNO uses red-green glasses for measuring stereopsis (480 - 15 seconds)

Titmus uses Polaroid glasses (3000 - 100 seconds)