Exclusion criteria:
(1) retinal detachment
(2) preoperative visual acuity of light perception only or no light perception
(3) previous vitrectomies or scleral buckling procedures
(4) follow-up period < 6 months
Patients who are predicted to have a postoperative visual acuity < 0.1 at 6 months after surgery:
(1) hand movement and worse, rubeosis present, and visual acuity in opposite eye < 0.5
(2) better than hand movement, 0 to 2 vascular disorders, and visual acuity in opposite eye < 0.2
(3) better than hand movement, 3 vascular disorders, and visual acuity in opposite eye < 0.5
Vascular disorders:
(1) macroangiopathy
(2) neuropathy
(3) nephropathy
where:
• Visual acuity appears to be expressed as the equivalence distance.
• Hand movement corresponds to a visual acuity of 0.01
• Finger counting corresponds to a visual acuity of 0.03.
• Rubeosis = new formation of blood vessels and connective tissue on the surface of the iris (iridis diabetica).
