1. An ophthalmology apparatus comprising: an input device configured to input a corneal endothelial cell image obtained by irradiating a slit light obliquely on an eye to be examined and photographing a reflected image of the slit light from a corneal endothelial cell of the eye; a processor configured to extract a dark area from the corneal endothelial cell image input by the input device, and to analyze the extracted dark area, wherein the processor is configured to determine a boundary of the dark area on the basis of a change in a grey level of the corneal endothelial cell image; and an output device configured to output a result of the analysis by the processor.