Set yourself up for success, Have a quiet dark room, a comfortable exam space, a stool, and an assistant. If presenting for other problems as well, do the eye exam first.Have a systematic plan and stick to it.
Perforation, especially if leaking, is a definite emergency if globe is to be saved. Perforation typically has a fibrin plug, blood, iris adhered to cornea, collapsed anterior chamber, aqueous humor leakage
The crystalline lens is a remarkable structure. As with the cornea, nature found a way to arrange living cells such into an optically transparent structure. The purpose of the lens is to serve as a final focus of light entering the eye onto the retina and to accommodate focus for near and far images.