EXAM second half

Question 1

Power cross given L+2.00/-4.00X90

Answer 1

Cross with one line being +2.00@90, and one being -2.00@180
Power cross has axis by 90, and cyl in relation to normal power
Plano must be written as Plano@(angle)

Question 2

Cylinder cross given Lplano/-3.00X90

Answer 2

Cross with one line being -3.00x90, and one being planox180

Question 3

Px script: R+2.00, L-2.00: forgot WD lens, what will ret appear as

Answer 3

R: against motion
L: neutral

Question 4

Recording pupil test when pupils are unequal size (OD>OS 2mm) and OS lid is drooping:

Answer 4

Anisochoria OD>OS by 2mm

Partial ptosis on OS

Question 5

Recording loss of motility in one eye -diplopia

Answer 5

with ticks and crosses R/L
Suspect CNIII palsy
Amblyopia (suppresion)

Question 6

Tentative add equation:

Answer 6

18.5-(0.3xAGE) = amplitude of accommodation

Tentative add = 1/WD - Amplitude/2

Question 7

LogMAR chart optotypes from 3:

Answer 7

3, 3.8, 4.8, 6, 7.5, 9.5, 12, 15, 18, 24, 30, 38, 48, 60, 120

Question 8

Binocular balance for uneven VA and presbyopia:

Answer 8

Humphris, prism with duochrome

Not needed for presbyopia, accommodative balance is not needed

Question 9

Ray trace diagram

Answer 9

[Light source] -> (two diverging beams) -> [cornea] -> (parallel beams) -> [lens] -> (converging beams) -> [retina]

Question 10

Iris diameter

Answer 10

HVID = 12mm from limbus to limbus