If a picture is taken, the resulting image will be as unsharp as you see it in the viewfinder.
Fundus photographs are visual records which document the current ophthalmoscopic appearance of a patient's retina.
One picture is worth, in this instance, a thousand words in the physician's notes.
This mirror reflects the light up into a series of lenses which focus the light.
A mask on the uppermost lens shapes the light into a doughnut.
Your eyes are focused on the reticle, and the image from the fundus camera corresponds with the film plane.