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  • noun

Synonyms for diopter

a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters


References in periodicals archive ?
Self-imaging the eye was performed successfully using a smartphone and 90 Diopter lens while facing a mirror.
Ten-year follow-up of photorefractive keratectomy for myopia of more than 6 diopters.
Schwiegerling estimates that an amateur astronomer whose dark-adapted pupils span 6 millimeters typically will experience a half diopter of night myopia, while the rare stargazer whose pupil can open up as wide as 8 mm may experience a 1 1/2-diopter effect--though both numbers vary widely within the human population.
clinical studies, 100 percent of patients returned to within one diopter of their original refraction after their Intacs were removed and 86 percent returned to within one-half diopter.
They feature central focus control and a newly designed locking diopter control that maintains left/right balance Both models weigh 34.
Features: 3-125mm motorised zoom lens, infra red focus, LCD panel which indicates infinity focus, self-timer/remote control mode, red eye reduction, flash cancel, anytime flash and slow sync flash facilities, focus lock facility, close-up shooting facility, diopter adjustment, automatic rewind, mid roll rewind, tripod socket, carry case.
The Eye-Q system, manufactured by WaveLight AG, corrects one diopter of nearsightedness or farsightedness in just two seconds.
9' and the diopter can be locked to prevent it from acciden- c tally being changed.
Designed to work in conjunction with the hooded front sight, the Rotary Diopter Sight System attaches to the receiver's M1913 rail.
The central focusing knob performs two functions: focusing and diopter adjustment.
Other problems have included improper collimation, no purging and incorrect zero diopter settings and infinity focus.
Examples: a positive lens with a focal length of 1 meter has a strength of 1 diopter, or +1.