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Table 2 Visual function results

From: Argus II retinal prosthesis for retinitis pigmentosa in the Middle East: The 2015 Pan-American Association of Ophthalmology Gradle Lecture

Patient no

Duration of implantation (months)

Pre-Op visual acuity

Post-Op visual function test (number of correct responses, out of 40 for SL and 80 trials for DOM)

Post-Op visual acuity

Comment

   

SL

DOM

GVA

  

1

47.0

BLP

24/40

46/80

2.9 LogMAR

CF

Large improvement

2

47.0

BLP

17/40

9/80

3.0 LogMAR

LP

Improvement

3

38.0

LP

23/40

15/80

2.9 LogMAR

HM

Large improvement

4

38.0

BLP

11/40

37/80

2.9 LogMAR

CF

Large improvement

5

38.0

BLP

11/40

15/80

3.0 LogMAR

LP

Improvement

6

25.0

BLP

NA

NA

NA

BLP

Stable

7

25.0

LP

36/40

21/80

3.0 LogMAR

LP + 

Improvement

8

9.0

LP

21/40

34/80

2.9 LogMAR

CF

Large improvement

9

5.0

LP

7/40

21/80

3.0 LogMAR

LP

Stable

10

5.0

LP

31/40

27/80

3.0 LogMAR

LP + 

Improvement

  1. Performance levels are the best out of 4 visits
  2. No. Number, Pre-op Preoperative, Post-op Postoperative, BLP Bare light perception, LP Light perception, LP +  = Light perception and projection, HM Hand movements, CF Counting fingers, SL Square localization, DOM Direction of movement; GVA Grating of visual acuity, LogMAR logarithm of the minimum angle of resolution, NA Not available