logmar chart

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logmar chart

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Page 1: Logmar Chart

Logmar chart

Page 2: Logmar Chart

MAR=Minimum Angle of Resolution -the angle subtended within the eye by a letter

How does LogMAR relate to Snellen? Letter on 6/6 line subtends an angle of 5 seconds of

arc; each limb subtends 1 second of arc Minimum Angle of Resolution for a 6/6 letter is 1

second of arc.-the log of the MAR for a 6/6 size letter is 0

Scoring LogMAR Each letter has a score value of 0.02 log units;5 letters

per line Each line represents a change of 0.1 log units Final score based precisely on total of all letters read

Page 3: Logmar Chart

LogMAR / Snellen equivalent results

Page 4: Logmar Chart
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Page 6: Logmar Chart

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