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A calculator to quickly and easily convert spectacle Rx to a contact lens Rx and its spherical equivalent.
31 sie 2023 · Multifocal contacts have two or more prescriptions built into a single lens. Most often, this is done by separating a lens into different visual zones—one for nearby vision and one for distant vision.
These soft bifocal and multifocal contact lenses provide constant distance and near correction to the treatment zone in center-distance and center-near designs when the lens is worn. Both designs remove hyperopic defocus, which causes axial elongation of the eye.
11 sie 2023 · Featuring a contact lens cheat sheet, this article reviews the various types of contact lenses and patient selection pearls.
18 sie 2020 · These contact lenses can accommodate multiple different prescriptions in a single lens so that the wearer can focus clearly on objects at a wide range of distances, whether they are reading or driving. There are even multifocal contact lenses that will also correct astigmatism.
The first time you wear any type of multifocal contact lenses, it is not uncommon to see shadows or 3-D images up close or have your distance vision not be as crisp as you’d like. It’s like looking through a screen door.
15 sie 2016 · First and foremost, unlike in multifocal spectacles, the distance and near powers of many multifocal contact lenses are organized in an annular center-and-surround configuration; thus, successful fitting of these lenses requires proper centration and careful monitoring of the patient’s pupil size.
