4801
In this chapter , we review ophthalmic applications of nanotechnology in the following areas : drug and trophic factor therapy for glaucoma , retinal degenerative , and retinal vascular disease ; gene therapy for retinal degenerative disease ; regenerative medicine , including optogenetics and optic nerve regeneration ; and diagnostics ( minimally invasive IOP monitoring ) .
 Chemical: retinal
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: retinal