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Pupil dilation typically begins within 15 minutes and may last for 3–8 hours. [6] [7] After the pupil has been dilated, an ophthalmoscope can be used to examine the fundus. This allows for 15x magnification of the optic disc, also known as the optic nerve head, and retina to better evaluate for any ophthalmic pathology. [9]
The bright initial flash of a nuclear weapon is the first indication of a nuclear explosion, traveling faster than the blast wave or sound wave. [6] "A 1-megaton explosion can cause flash blindness at distances as great as 13 miles (21 km) on a clear day, or 53 miles (85 km) on a clear night.
Greater pupil diameter was observed after the items were heard (depending on how many items were heard), and decreased after items were repeated. [57] The more difficult the task, the greater pupil diameter observed from the time preceding the solution [ 58 ] until the task was completed. [ 59 ]
The Neurological Pupil index, or NPi, is an algorithm developed by NeurOptics, Inc., that removes subjectivity from the pupillary evaluation. A patient's pupil measurement (including variables such as size, latency, constriction velocity, dilation velocity, etc.) is obtained using a pupillometer, and the measurement is compared against a normative model of pupil reaction to light and ...
The pupil is a hole through which the eye's interior can be viewed. For better viewing, the pupil can be opened wider (dilated; mydriasis) before ophthalmoscopy using medicated eye drops (dilated fundus examination). However, undilated examination is more convenient (albeit not as comprehensive), and is the most common type in primary care.
where is the pupil diameter measured in millimeters and () is the luminous intensity reaching the retina in a time , which can be described as =: luminance reaching the eye in lumens/mm 2 times the pupil area in mm 2.
Remember that it’s not just about the 16 hours you’ll sit for the test but also understanding what you’ll be tested on and ways to manage your time before and on exam day.
The latency of pupillary response (the time in which it takes to occur) increases with age. [16] In ophthalmology, intensive studies of pupillary response are conducted via videopupillometry. [17] Anisocoria is the condition of one pupil being more dilated than the other.