Table 1 The range of stimulation thresholds for different pixel sizes.

From: Cortical responses elicited by photovoltaic subretinal prostheses exhibit similarities to visually evoked potentials

 

Large (280 μm)

Medium (140 μm)

Small (70 μm)

 

4 ms

10 ms

4 ms

10 ms

4 ms

10 ms

LE

 Range

0.5–2.5

0.25–0.5

0.25–1

0.25–0.5

2.5–10

1–2.5

 Avg

1.13

0.44

0.56

0.38

5.63

2.13

 s.d.

0.95

0.13

0.31

0.14

3.15

0.75

 N

4

4

4

4

4

4

RCS

 Range

0.5–2.5

0.25–0.5

0.5–2.5

0.5–2.5

0.5–5

1–2.5

 Avg

1.13

0.42

1.25

1.5

2.3

1.9

 s.d.

0.95

0.14

0.87

0.94

1.75

0.82

 N

4

4

5

5

6

6

All

 Range

0.5–2.5

0.25–0.5

0.25–2.5

0.25–2.5

0.5–10

1–2.5

 Avg

1.13

0.43

0.91

1

3.78

2.05

 s.d.

0.88

0.12

0.71

0.89

2.88

0.72

 N

8

8

9

9

10

10

  1. Avg, average; LE, Long-Evans.
  2. Range, average (avg) and s.d. of peak irradiance thresholds (mW mm−2) for LE and RCS rats implanted with three sizes of photodiode arrays (large, medium and small).
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