The Collaborative International Dictionary
Ophthalmoscopy \Oph`thal*mos"co*py\, n. [Cf. F. ophthalmoscopie.]
A branch of physiognomy which deduces the knowledge of a person's temper and character from the appearance of the eyes.
Examination of the eye with the ophthalmoscope.
Wiktionary
n. The design, construction and use of ophthalmoscopes
Wikipedia
Ophthalmoscopy, also called funduscopy, is a test that allows a health professional to see inside the fundus of the eye and other structures using an ophthalmoscope (or funduscope). It is done as part of an eye examination and may be done as part of a routine physical examination. It is crucial in determining the health of the retina, optic disc, and vitreous humor.
The pupil is a hole through which the eye's interior will be viewed. Opening the pupil wider (dilating it) is a simple and effective way to better see the structures behind it. Therefore, dilation of the pupil ( mydriasis) is often accomplished with medicated eye drops before funduscopy. However, although dilated fundus examination is ideal, undilated examination is more convenient and is also helpful (albeit not as comprehensive), and it is the most common type in primary care.
An alternative or complement to ophthalmoscopy is to perform a fundus photography, where the image can be analysed later by a professional.