Early Laser Treatment for Diabetic Eye Disease in China : A Pilot Randomized Trial

Inclusion Criteria:

• Adults aged >= 18 years with untreated DR at severe or very severe NPDR stage ineither one or both eyes, according to the clinical opinion of the investigator.
• Sufficiently clear ocular media to allow visualization of the retina and retinalphotography in either eye.
• Capable of giving informed consent.

Exclusion Criteria:

• DR at later stage of retinopathy than severe or very severe (eg, two or more of the 4-2-1 criteria are met) NPDR in either eye, but a patient may be enrolled if one eyehas severe or very severe NPDR and the fellow eye has PRP-treated PDR and has beenstable after treatment.
• Clinically significant macular edema in either eye.
• Dense cataracts or other media opacity preventing visualization of the retina in theeye.
• History of previous surgical or laser treatment for DR or other retinal conditions ina study eye, including history of anti-VEGF or corticosteroid injection or focal laserfor DME within 6 months, or any history of scleral buckle, vitrectomy or other retinaldetachment repair.
• History of other retinal vascular disorders including CRVO, CRAO, BRVO, BRAO in thestudy eye.
• Previous cataract or glaucoma surgery is specifically allowed if performed ≥ 6 weeksprior to enrollment.
• Pregnancy.
• Severe renal insufficiency treated with hemodialysis treatment, kidney transplant,pancreatic transplant, and intensive insulin therapy initiated within 4 months.
• Nystagmus, unable to cooperate with laser treatment.