what is 1 60 vision Decimal The visual acuity can be expressed in decimal or percentage for example 0 8 80 1 0 100 or 1 2 120 In this system 1 0 or 100 means the average
Daylight vision i e photopic vision is subserved by cone receptor cells which have high spatial density in the central fovea and allow high acuity of 6 6 or better In low light i e scotopic vision cones do not have sufficient sensitivity and vision is subserved by rods Spatial resolution is then much lower This is due to spatial summation of rods i e a number of rods merge into a bipolar cell The 20 60 line is the smallest line of letters that the second person can see at a distance of 20 feet The first person with normal 20 20 vision might see the identical line from 60
what is 1 60 vision
what is 1 60 vision
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The results of an eye chart exam are based on a reading distance of 20 feet To interpret your reading it helps to think of the numbers in feet For instance someone with 20 60 vision can read at Visual acuity is the clarity of your eyesight measured by your ability to identify letters or numbers on a standardised eye chart from a specific viewing distance
The top line on the chart is designated 6 60 The second line up from the bottom on most charts is 6 6 and represents normal sight commonly known as 20 20 vision particularly in the USA as 6 metres is equivalent Interpretation It is a persistent urban legend that 20 20 would represent normal average or even perfect vision This is not so Snellen deliberately chose his reference standard 5 min of arc as a
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It measures the sharpness of your sight at 20 feet from an object Having 20 60 vision means that you must be at 20 feet to see what a person with normal vision can see at Instructions for Conversion Chart Refractive State to estimated Visual Acuity Example 1 DS Result in minus use myopia columns Myopia conversions are for all ages
Low vision is a condition caused by eye disease in which visual acuity is 20 70 or poorer in the better seeing eye and cannot be corrected or improved with regular eyeglasses 1 00 0 10 20 200 6 60 1 10 0 08 20 250 6 75 severe impairment 1 20 0 063 20 300 6 95 1 30 0 050 20 400 6 120 1 40 0 040 20 500 6 150 blindness 1 50 0 032
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what is 1 60 vision - A visual acuity test is an eye examination that measures your eyes ability to read or see small details In simple terms a visual acuity test determines how sharp and