LASER IN DIABETIC MACULOPATHY

INDICATION-

all eyes with clinically significant macular edema irrespective of level of visual acuity as it reduces the risk for visual loss by 50%

CONTRAINDICATION-

severe ischaemic maculopathy

FOCAL LASER-

deliver burns to microaneurysm or at centre of ring of exudates

500 -3000 micron from centre of macula (upto 300 micron may be needed if CSME persists despite previous treatment and visual acuity is less than 6/12, exposure is .05 s)

spot size - 50-100 micron

exposure .1s

power sufficient to obtain gentle whitening or darkening of the lesions

MACULAR GRID-

500 micron from centre of macula, and 500 micron from temporal margin of disc

spot size 100 micron

exposure time .1 s

light intensity burn