→How to use a Snellen Chart with refraction
(→Tools: Stenopaeic Slit for measuring with astigmatism) |
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==Tools== | ==Tools== | ||
* [http://www.i-see.org/block_letter_eye_chart.pdf Block Letter Eye Chart with calibration measurement instructions 20m/6ft)] | |||
* [http://www.i-see.org/etdrs/etdrs-1.pdf ETDRS Snellen version 1 20m/6ft] | |||
* [http://www.i-see.org/etdrs/etdrs-2.pdf ETDRS Snellen version 2 20m/6ft] | |||
* [http://www.i-see.org/etdrs/etdrs-r.pdf ETDRS Snellen version 3 20m/6ft] | |||
* [https://www.provisu.ch/images/PDF/Snellenchart_en.pdf Printable Snellen Chart 2.8m(9 feet)] | * [https://www.provisu.ch/images/PDF/Snellenchart_en.pdf Printable Snellen Chart 2.8m(9 feet)] | ||
* [https://www.teachengineering.org/content/cub_/activities/cub_human/cub_human_lesson06_activity1_eyechart.pdf Printable Snellen Eye Chart 6m(20 feet)] | * [https://www.teachengineering.org/content/cub_/activities/cub_human/cub_human_lesson06_activity1_eyechart.pdf Printable Snellen Eye Chart 6m(20 feet)] | ||