Eye s bottom research.

A more deeply eyes sides research are glass body, retina in ophtalmology using for  pupil are drops, as early these are calling atropin, is alkaloid of herbs of parsnip as in Atropa belladonna, Hyoscyamus niger L, As atropin is a base of atropa, his failure is long pupil extension  till a few days, that not comfortable for patients, because of paralysis of accomodation and problems happening in a working on near distance and in medicament's pupil extension is discomfort in clear light, as therefore protection eye reaction on clear light  is narrowing pupil not works, as before atropin entering doctor will talk.

But today using drops where effect is hour, in 50 minutes all reactions with accommodation on the light is passing away, or in two hours.
Ophtalmoscope using for a checking eye s bottom, as here doctor finding retina disease and vision nerve.