Diopters

Some articles on diopters:

Orthokeratology - Indications
... for Paragon CRT is for procedures up to −6.00 diopters of myopia and up to −1.75 diopters of astigmatism whilst the approvals for Euclid (and thus for the other five lens ... Kingdom, the procedure is offered primarily for myopic correction up to −5.00 diopters and up to −1.50 diopters of astigmatism ...
Trifocal Lenses
... people with advanced presbyopia who have been prescribed 2 diopters or more of reading addition ... So, for someone with a distance prescription of -4 diopters and a reading addition of +3, the reading portion of their trifocals would have a net power of -1, and ...
Myopia - Epidemiology - Australia
... In Australia, the overall prevalence of myopia (worse than −0.50 diopters) has been estimated to be 17%. 12 were found to have myopia greater than −0.50 diopters ... of Australians aged 40 or over have at least −1.00 diopters of myopia and 2.5% have at least −5.00 diopters ...
Lens Clock - Radius of Curvature - Example—correcting For Refractive Index
... If the lens clock gives surface powers of −3.0 and −7.0 diopters (dpt), the optical power of the lens is obtained as follows First, the radii of ... might differ by as much as 0.1 diopters ... surface powers given by the clock, −10 diopters, because the clock is calibrated for glass with a different index of refraction ...
Myopia - Epidemiology - United States
... years) found nearly one in 10 (9.2%) have at least − 0.75 diopters of myopia ... A recent review found 25.4% of Americans aged 40 or over have at least −1.00 diopters of myopia and 4.5% have at least −5.00 diopters ...