Referring to the LogMAR visual acuity chart. 

a. What does LogMAR stand for?

b. What is the distance between the two letters in each row?

c. What is the distance between adjacent rows of letters?

d. What is the LogMAR value for a visual acuity of:

i. 6/60 and
ii. 6/6?

 
Answer a
Logarithm of the Minimal Angle of Resolution.
It is also called the Bailey-Lovie chart.k
 

Answer b
The distance between the letters in each row is equal 
to one letter width of the same row.k
 

Answer c
The distance between adjacent row is equal to 
the height of the letters in the smaller row ie. the letters 
below.
 

Answer d
i. 1.0 for 6/60
ii 0 for 6/6.kk