the art and science of eyesight and attention attention
Measurement associated with the variety of vision, esp. by way of the optometer.
As defined (with small variations) when you look at the statutes of varied States of this US
“The work of subjective and unbiased technical means to figure out the accomodative and refractive states of attention plus the range of the purpose as a whole.”
“The employment of any means, other than the use of drugs, for the measurement of the powers of vision and adaptation of lenses for the aid thereof.”
The measurement of the number of eyesight.
The measurement associated with the visual capabilities as a whole (like the acuteness associated with perception of type, of light, and of colors — eidoptometry, photoptometry, and chromatoptometry correspondingly), associated with the degree of the artistic area (perioptometry), regarding the accommodative and refractive states of attention (dioptometry), as well as the positioning and motions associated with eyeball. (ophthalmostatometry and ophthalmotropometry).