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Oculometer is a device that tracks eye movement. [1] [2] The oculometer computes eye movement by tracking corneal reflection relative to the center of the pupil. [3]An oculometer, which can provide continuous measurements in real time, can be a research tool to understand gaze as well as cognitive function.
The Little Professor is a backwards-functioning calculator designed for children ages 5 to 9. Instead of providing the answer to a mathematical expression entered by the user, it generates unsolved expressions and prompts the user for the answer.
Christiaan Huygens, another Dutchman, developed a simple 2-lens ocular system in the late 17th century that was achromatically corrected, and therefore a huge step forward in microscope development. The Huygens ocular is still being produced to this day, but suffers from a small field size, and other minor disadvantages. [citation needed]
The newborn's visual acuity is approximately 6/133, developing to 6/6 well after the age of six months in most children, according to a study published in 2009. [36] The measurement of visual acuity in infants, pre-verbal children and special populations (for instance, disabled individuals) is not always possible with a letter chart.
An ocular micrometer or eyepiece micrometer is a glass disk, engraved with a ruled scale, that fits in an eyepiece of a microscope, [1] [2] which is used to measure the size of microscopic objects through magnification under a microscope. When the eyepiece micrometer is calibrated using a stage micrometer, the length of the divisions on the ...
Intra-ocular lens IOP: Intra-ocular pressure ISNT: Inferior, Superior, Nasal, Temporal ... Age-related macular degeneration ACG/CAG Angle closure glaucoma BDR
The pattern deviation probability plot (or total deviation probability plot when MD is worse than -20 dB) is used to identify abnormal points and age corrected sensitivity at each point is calculated using total deviation numerical map. VFI is a reliable index on which glaucomatous visual field severity staging can be based. [22]
Retinoblastoma is a rare but life-threatening eye cancer that primarily affects children under the age of 5. [ 15 ] [ 16 ] Amblyopia , often also called lazy eye, is a common condition in children where the neurological connection between the eye and brain fails to fully establish, resulting the brain's inability to process the visual ...