From aeulenbe@indiana.edu Thu Oct 30 18:52:59 1995
Date: Mon, 30 Oct 1995 18:33:03 -0500 (EST)
From: Alex Eulenberg <aeulenbe@indiana.edu>
Subject: Measuring your myopia
Status: RO
X-Status: 

Here's a rough-and-ready way you can tell how many diopters of myopia you
have. It works for nearsighted people who have little or no 
astigmatism.

Take a piece of paper with a detailed image on it (a text will do), and
find the furthest distance at which the image is absolutely clear. Take
the reciprocal of that distance in meters, and you have your amount of
myopia. For example, say the furthest distance you can see absolutely
clearly is a 0.5 meters, then you have 1 / 0.5 = 2 diopters of myopia.  If
you know your prescription, do this test anyway and see how close you
come.

--Alex 


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