Assessment Of Visual Function

Question 0

LogMAR equivalents

Answer 0

0. 00=6/6 0.30=6/12 0.60=6/24 0.90=6/48 1.00=6/60

7. 5 9.5 15 19 30 38

Question 1

Advantages of logMAR

Answer 1

Equal number of letters per line, logarithmic change, uniform spacing between lines and letters, final score based on letters read, finer grading scale

Question 2

What are the advantages of Pelli-robson charts?

Answer 2

Real life ability, useful in assessing extent of ocular pathology, px may have good VA but poor low contrast VA
Repeatable to within 1 step (0.15 log units)

Question 3

What are indications for cycloplegic?

Answer 3

Children with unexplained poor VA, children with poor stereopsis, children with an esophoria or manifest esotropia, children with over or under active accommodation, FH of hypermetropia or squint.

Question 4

What acuity test do you use for children < 12 months

Answer 4

Electrophysiology or keeler PL cards

Question 5

What acuity test do use for 1 year - 3 years?

Answer 5

Cardiff cards, hundreds and thousands

Question 6

What visual acuity test would you use between 2-4 years

Answer 6

Kay pictures at 3m or 6m, Sheridan Gardner, logMAR crowded, lea symbols

Question 7

What is visual acuity in the first year of life?

Answer 7

6/360 - 6/15

Question 8

What is acuity in second year?

Answer 8

6/90 at 1 by 2 6/15-6/90

Question 9

Age 3?

Answer 9

6/12