What do systematic reviews say?

0.5 vs 0.1 second exposure

0.5 may leads to lower BCVA: loss of 15 or more EDTRS letters ‐ 1 year compared with 0.1 second exposure (low certainty).

• Different lasers and techniques for proliferative diabetic retinopathy 2018 · Cochrane Headline outcomes only
  RR 0.42
  1 study · 44 participants
  Low

0.5 vs 0.1 second exposure

0.5 showed no clear difference in BCVA: gain of 15 or more EDTRS letters ‐ 1 year compared with 0.1 second exposure (low certainty).

• Different lasers and techniques for proliferative diabetic retinopathy 2018 · Cochrane Headline outcomes only
  RR 2.22 [0.68, 7.28]
  1 study · 44 participants
  Low

0.5 vs 0.1 second exposure

It is very uncertain whether 0.5 changes progression of PDR ‐ 1 year compared with 0.1 second exposure (very low certainty).

• Different lasers and techniques for proliferative diabetic retinopathy 2018 · Cochrane Headline outcomes only
  RR 0.33 [0.02, 7.14]
  1 study · 16 participants
  Very low

0.5 vs 0.1 second exposure

0.5 showed no clear difference in regression of PDR ‐ 1 year compared with 0.1 second exposure (low certainty).

• Different lasers and techniques for proliferative diabetic retinopathy 2018 · Cochrane Headline outcomes only
  RR 1.17 [0.92, 1.48]
  1 study · 32 participants
  Low

0.5 vs 0.1 second exposure

The review found no eligible studies for this question.

• Different lasers and techniques for proliferative diabetic retinopathy 2018 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

0.5 vs 0.1 second exposure

• Different lasers and techniques for proliferative diabetic retinopathy 2018 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 44 participants
  Very low