Ophthalmoscopic contact lenses for transpupillary thermotherapy.

Ophthalmoscopic contact lenses for transpupillary thermotherapy. Research Abstract Details 

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Ophthalmoscopic contact lenses for transpupillary thermotherapy. Abstract Text:

Ophthalmoscopic contact lenses for transpupillary thermotherapy (TTT) must provide effective visualization of retinal treatment sites and transmission of infrared diode laser radiation. Selection and proper use of retinal laser lenses requires knowledge of their lateral magnification, laser beam magnification factor, field of view and resolution. Optical performance is analyzed for Goldmann-type lenses and a series of inverted image lenses of differing magnification. Goldmann lenses have the highest resolution, but inverted image lenses of comparable magnification have 2.5 times or more their field of view. Inverted image lenses of similar magnification can differ in resolution. They require 2-4% more incident laser power to produce the same retinal irradiance as a Goldmann lens, but this difference is small in comparison to other clinical variables. Tilting an ophthalmoscopic contact lens up to 15 degrees causes little distortion in the circularity of the retinal spot formed by a laser beam or difference in retinal irradiance across the spot. Inverted image lenses produce higher anterior segment irradiances than Goldmann-type lenses, but anterior segment injuries are less likely in TTT than conventional visible light, short-pulse retinal photocoagulation because of the comparatively low irradiances used in TTT and the decreased absorption of diode laser infrared radiation in ocular media and melanin.

Ophthalmoscopic contact lenses for transpupillary thermotherapy. Publishing Authors By Initials

For similar equipment and supplies: diagnostic equipment: ophthalmoscopes research abstracts see: equipment and supplies: diagnostic equipment: ophthalmoscopes research

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Ophthalmoscopic contact lenses for transpupillary thermotherapy. Journal Published:

PUBLICATION TYPE: Review

Journal: Seminars in ophthalmology

VOLUME: 16

Page Numbers: 60-5

Journal Abbreviation: Semin Ophthalmol

ISSN: 0882-0538

DAY: 28

MONTH: Jun

YEAR: 2001

Ophthalmoscopic contact lenses for transpupillary thermotherapy. Information

Number of References: 25

LANGUAGE: eng

NlmUniqueID: 8610759

Ophthalmoscopic contact lenses for transpupillary thermotherapy. Keywords Mesh Terms:

KEYWORDS: Ophthalmoscopes

MESH TERMS: instrumentation

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Grant and Affiliation Information for Ophthalmoscopic contact lenses for transpupillary thermotherapy.

AFFILIATION: Department of Ophthalmology, University of Kansas Medical Center, 3907 Rainbow Boulevard, Kansas City, KS 66160-7379, USA.

Country: United States

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MEDLINETA: Semin Ophthalmol

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