- Place the facing chart (called 'E Chart' at a distance of 3 meters/9.6 feet)
- Cover your left eye with one hand and try to determine which direction the character 'E' is facing, use your right eye.
- When finished with right eye, repeat the exercise with left eye.
- This can also be exercised to determine wether the glasses someone is currently using are still good for him.
- Smaller the symbols you can determine, better is your eye sight. The figures below each line of symbols tell how good or weak the eyesight is.
- Normal eyesight falls between 6/6 and 6/18. Higher numbers represent weaker eyesight.
- 6/6 - 6/9 is normal vision; no glasses needed.
- 6/12 - 6/18 will need glasses for driving and at school.
- For 6/24 - 6/60, patient must use glasses.
- When eyesight is found weak, try checking vision through a pinhole. Pinhole phenomenon can be developed pinning a small pin-sized hole in a hard paper and covering eye with that paper, positioning the pinhole so the subject can see through that small hole.
- If vision improves with pinhole, you can get glasses from a optician. Otherwise, you must see an ophthalmologist.
- This is good for checking only distant eye sight.
|
 |