Ads
related to: air optix multifocal contact lenses1800contacts.com has been visited by 10K+ users in the past month
Search results
Results From The WOW.Com Content Network
The US Food and Drug Administration (FDA) defines soft contact lenses as: made of soft, flexible plastics that allow oxygen to pass through to the cornea. Soft contact lenses may be easier to adjust to and are more comfortable than rigid gas permeable lenses. Newer soft lens materials include silicone-hydrogels to provide more oxygen to your ...
Multifocal contact lenses (e.g. bifocals or progressives) are comparable to spectacles with bifocals or progressive lenses because they have multiple focal points. Multifocal contact lenses are typically designed for constant viewing through the center of the lens, but some designs do incorporate a shift in lens position to view through the ...
Multifocal diffractive lens. A multifocal diffractive lens is a diffractive optical element (DOE) that allows a single incident beam to be focused simultaneously at several positions along the propagation axis. [1] Example of multifocal peak intensity distribution along optical axis. (Courtesy of Holo/Or)
For the purposes of ray tracing, this is equivalent to a series of identical thin lenses of focal length f = R/2, each separated from the next by length d. This construction is known as a lens equivalent duct or lens equivalent waveguide.
CooperVision develops, manufactures, and markets a range of contact lenses to a worldwide market. CooperVision produces both spherical contact lenses and specialty lens products in varying wearing and replacement schedules (i.e., how long a lens can be worn prior to removal and before it must be discarded). [11]
Multifocal lens may refer to: Progressive lens, used in eyeglasses. Multifocal intraocular lens. Multifocal diffractive lens, a diffractive optical element used with lasers. Categories: Disambiguation pages. Lenses.
Ads
related to: air optix multifocal contact lenses1800contacts.com has been visited by 10K+ users in the past month