Optics:is the branch of physics which involves the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it
Entoptic Phenomenon Definition: are visual effects whose source is within the eye itself. (Occasionally, these are called entopic phenomena, which is probably a
Retinoscope Definition: A retinoscope is an instrument used to objectively determine the refractive power of the eye. It works by allowing
Focimeter Definition: An ophthalmic instrument. It is mainly used by optometrists and opticiansto verify the correct prescription in a pair of eyeglasses, to properly orient and
Synoptophore Definition: This is an Ophthalmic Instrument, used for diagnosing imbalance of eye muscles and treating them by orthoptic methods.
Haidinger’s brush appears on computer screens and blank areas of sky, and it’s caused by the way our eyes respond to