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Multifocal plane microscopy (MUM), also known as multiplane microscopy or multifocus microscopy, is a form of light microscopy that allows the tracking of the 3D dynamics in live cells at high temporal and spatial resolution by simultaneously imaging different focal planes within the specimen.
Adjustable focus lenses, like single-focus lenses, also reduce image-jump and spatial distortion in the field of view associated with traditional multi-focal lenses. Additionally, the ideal near-vision correction can be achieved with precision, because the variable lenses emulate the focusing action of the youthful (non-presbyopic) eye.
Phakic intraocular lenses are indicated for patients with high refractive errors when the usual laser options for surgical correction (LASIK and PRK) are contraindicated. [ 1 ] [ 2 ] Phakic IOLs are designed to correct high myopia ranging from −5 to −20 D if the patient has enough anterior chamber depth (ACD) of at least 3 mm. [ 3 ]
IOLs can be used to correct other vision problems, such as toric lenses for correcting astigmatism. [38] IOLs can be classified as monofocal, toric, and multifocal lenses. [39] Ocular anaesthesia has improved since Alfred Einhorn synthesised procaine in 1905, which was used in retrobulbar anaesthesia.
A contact lens, or simply contact, is a lens placed on the eye. It is a contact lens placed on the eye to correct vision. (could you please add to correct vision). Funkyeyes123 18:56, 3 November 2012 (UTC) Not done:. The next sentence already states that contacts are used to correct vision and for cosmetic reasons, which are both correct.
The change in the subject size is a significant problem in video and true parfocal designs are needed for higher quality video work. Varifocal lenses can be used for image display as well as capture, and Meta's Reality Labs has confirmed developing a varifocal display for virtual reality. [2] A varifocal lens. Left image is at 2.8 mm, in focus.
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