Imaging Properties of Spectacle Lenses and their Influence on the Tolerance of Spectacle Correction

Klin Monbl Augenheilkd. 2021 Aug 11. doi: 10.1055/a-1553-6344. Online ahead of print.ABSTRACTIt is not uncommon for patients to complain about incompatibility with the glasses made, although an eyeglass determination has been performed with utmost precision. The causes for this can vary. Thus, the specification of the corneal vertex distance (HSA) is mandatory when prescribing spectacles in order to ensure the exact conversion of the measured values into the values in use. In addition, eye movements behind the lenses may result in a deviation from refractive accuracy and/or astigmatic deviation. Perceived colour fringes by the spectacle wearer are largely due to the choice of lens material. In preparation for a spectacle prescription, the correct choice of near addition can make reading at near physiologically tolerable. For this reason, the patient's individual remaining maximum amplitude of accommodation should always be determined. Especially when prescribing progressive-power lenses, it should be checked whether there is anisomotropy in the vertical direction. Asthenopic discomfort during near vision through the spectacle lenses can thus be avoided.PMID:34380158 | DOI:10.1055/a-1553-6344

Source: Klinische Monatsblatter fur Augenheilkunde - August 11, 2021 Category: Opthalmology Authors: Stephan Rei ß Source Type: research