Depends upon the cornea of the dead person. If it is intact & can be retrieved within 48 hours, then it is possible to give vision to others.
Other than that, it is not possible for everybody to donate. Simple thing is to register with Sankara Nethralaya to donate your eyes. If you communicate with them on a regular basis, then it is possible to donate eyes during demise.
Myself & my complete family have donated eyes & my dad has donated the complete body parts after demise. Question is, I do not know how much courage & logical reasoning someone will have to call up the hospital & discuss about eye/body donation once there is death in the family.
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Thanks & Regards
Karthik Gangaprakash
Chartered Accountant
GSM :
+973 - 3945 1473