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General (medical) practitioner HA: Headaches HARC: Harmonious abnormal retinal correspondence HM: Hand motion vision – state distance Hx: History IOL: Intra-ocular lens IOP: Intra-ocular pressure ISNT: Inferior, Superior, Nasal, Temporal rule used to assess optic disc appearance K: Keratometry OS oculus sinister (left eye) LHyperT or LHT ...
Cyanopsia is most commonly reported in older adults after cataract surgery, where symptoms typically subside within a few days to weeks as the eyes adapt to the synthetic lens. In younger adults, cyanopsia is often caused by medications like sildenafil, with symptoms disappearing once the drug's effects wear off.
An intraocular lens (IOL) is a lens implanted in the eye usually as part of a treatment for cataracts or for correcting other vision problems such as near-sightedness (myopia) and far-sightedness (hyperopia); a form of refractive surgery.
However, this crystal is seldom used as a polarizer, since the dichroic effect is strongly wavelength dependent and the crystal appears coloured. Herapathite is also dichroic, and is not strongly coloured, but is difficult to grow in large crystals. A Polaroid polarizing filter functions similarly on an atomic scale to the wire-grid polarizer ...
The GDx scanning laser measures the thickness of the retinal nerve fiber layer, which is the very first part of your eye that is damaged by glaucoma. Before we go any further, let us describe the basic GDx instrument. This instrument use a GaAIAs diode laser as a source of light. This diode will emit polarized light.
In cross-polarized light on left, plane-polarized light on right. The microscope employed is usually one which is provided with a rotating stage beneath which there is a polarizer, while above the objective or eyepiece an analyzer is mounted; alternatively the stage may be fixed, and the polarizing and analyzing prisms may be capable of ...
In anatomy, a crystallin is a water-soluble structural protein found in the lens and the cornea of the eye accounting for the transparency of the structure. [1] It has also been identified in other places such as the heart, and in aggressive breast cancer tumors.
Blue light, a type of high-energy light, is part of the visible light spectrum. High-energy visible light (HEV light) is short-wave light in the violet/blue band from 400 to 450 nm in the visible spectrum, which has a number of purported negative biological effects, namely on circadian rhythm and retinal health (blue-light hazard), which can lead to age-related macular degeneration.