6/6/2023 0 Comments Achroma intraocular lens![]() ![]() The aim of this review is to present current techniques of ocular biometry and IOL power calculation formulas, which will contribute to achieve highly accurate refractive outcomes. Recently, several modern optical instruments have been commercially launched and there are new methods available, including the empirical, analytical, numerical or combined methods to determine IOL power. The introduction of optical biometry (fast and non-invasive) has replaced ultrasound methods and is now considered as the clinical standard for ocular biometry. For many years, ultrasound biometry has been the standard for measurement of ocular parameters. The use of premium intraocular lenses (IOLs) (aspheric, toric, multifocal), refractive lens exchange and patients after refractive surgery procedures require extremely precise clinical measurements and IOL calculation formulas to achieve desired postoperative refraction. An achromatic lens comprising plural refracting lens element layers of similar materials having different indices of refraction combined together in optical alignment, further comprising a haptic extending from the lens for mounting the lens within a human eye.Since the introduction of phacoemulsification, cataract surgery has evolved remarkably. mechanical property or material property, at different locations within the same prosthesis differing in optical propertiesĢ8. A61F2250/0053- Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g.mechanical property or material property, at different locations within the same prosthesis A61F2250/0014- Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g.of the cornea, of the surface of the natural lens, aspheric, cylindrical, toric lenses A61F2/1637- Correcting aberrations caused by inhomogeneities correcting intrinsic aberrations, e.g.pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus multipart lenses having particular optical properties, e.g. ![]() A61F2/1613- Intraocular lenses having special lens configurations, e.g.lenses, corneal implants Implanting instruments specially adapted therefor Artificial eyes A61F2/02- Prostheses implantable into the body.artificial substitutes or replacements for parts of the body Appliances for connecting them with the body Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. A61F2/00- Filters implantable into blood vessels Prostheses, i.e. ![]() STENTS ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES FOMENTATION TREATMENT OR PROTECTION OF EYES OR EARS BANDAGES, DRESSINGS OR ABSORBENT PADS FIRST-AID KITS
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