MODEL RELEASED. Eye examination. Patient having his eyes scanned by a fundus camera. This camera is non-mydriatic, meaning that it does not require the use of pupil-dilating eyedrops to examine the fundus (the back of the eyeball), as it can photograph through a pupil as narrow as 3.7 mm. The camera is used during eye examinations to check for fundus problems, such as detachment of the retina (the light-sensitive membrane on which images are formed) and glaucoma (high pressure inside the eyeball). It can also produce specialist images such as retinal angiographs, where fluorescent dye highlights the retina's capillary system, revealing any hidden eye abnormalities.