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Prism correction is measured in prism dioptres. A prescription that specifies prism correction will also specify the "base". The base is the thickest part of the lens and is opposite from the apex. Light will be bent towards the base and the image will be shifted towards the apex. In an eyeglass prescription, the base is typically specified as up, down, in, or out, but left and right are also ...
In ophthalmology, horror fusionis is a condition in which the eyes have an unsteady deviation, with the extraocular muscles performing spasm-like movements that continuously shift the eyes away from the position in which they would be directed to the same point in space, giving rise to diplopia. Even when the double vision images are made to nearly overlap using optical means such as prisms ...
A laser pointer or laser pen is a (typically battery-powered) handheld device that uses a laser diode to emit a narrow low-power visible laser beam (i.e. coherent light) to highlight something of interest with a small bright colored spot.
Salma Hayek's go-to ingredient for ageless skin is in this $10 cream. Salma Hayek is an award-winning actress, film producer, director — the list goes on. But it's no secret that the 57-year-old ...
“I have friends in Palestine,” she tells the Hamas fighters who are holding her.
Strabismus can occur due to muscle dysfunction, farsightedness, problems in the brain, trauma, or infections. [3] Risk factors include premature birth, cerebral palsy, and a family history of the condition. [3] Types include esotropia, where the eyes are crossed ("cross eyed"); exotropia, where the eyes diverge ("lazy eyed" or "wall eyed"); and hypertropia or hypotropia where they are ...
Sean "Diddy" Combs issued an apology Sunday after footage was released that appeared to show him beating his ex-girlfriend Cassie in 2016.
The M1156 Precision Guidance Kit (PGK), formerly XM1156, is a U.S. Army -designed precision guidance system to turn existing 155 mm artillery shells into smart weapons. [2] The prime contractor was Alliant Techsystems – later merging with Orbital Sciences Corporation to form Orbital ATK, in turn being taken over by Northrop Grumman and ...
In a lengthy message posted to Instagram, Kate Beckinsale addressed the constant rumors she hears about her getting plastic surgery.
Diplopia is the simultaneous perception of two images of a single object that may be displaced horizontally or vertically in relation to each other. [1] Also called double vision, it is a loss of visual focus under regular conditions, and is often voluntary. However, when occurring involuntarily, it results from impaired function of the extraocular muscles, where both eyes are still functional ...