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Home eye experiment chart

Posted , 3 users are following.

trilemma
trilemma

The following attached image file is not fancy or sophisticated. It is in a second post, and is awaiting moderation. Its concept can be adjusted for your own purposes. The idea is that you would print the page on a laser printer, or other fairly high resolution printer. If you don't have one, your local library may, and expect that to be free or cheap. I tried to attach a doc file, but that did not work.

Font size is measured in points, and a point is 1/72 of an inch.

Maybe my chart will inspire somebody else to post a better one.

1 like, 3 replies

3 Replies

  • Guest
    Guest trilemma

    Edited

    Cool. After my surgery I used an app on my iPad called Eye Chart Pro. Works really well. You need a room that's at least 9 feet to use it as your eyes are supposed to be 8 feet from the chart / iPad. I just set my iPad on a shelf at eye level (standing) and put a piece of tape on the floor at the 8 foot distance. It has a remote too so you can step through each line remotely with your iPhone so you can focus on just 1 line at a time. Comes with standard Snellen and Logmar charts as well as a near vision chart for free and you can upgrade to a paid version for more charts.

  • phil09
    phil09 trilemma

    Edited

    Thanks, trilemma. This seems quite sufficient for my current purpose - just looking to track my ability to see fine details, and how that changes after cataract surgery. There seems to be little useful standardization for near vision testing, so a printout of small-to-medium fonts seems as good as any other approach.

    .

    Pre-surgery, I can read capital letters in 3-point font (I used Liberation Serif) without glasses using my near eye, which has the more severe cataract. As best I can tell, that's about 20/20 or logmar 0.0 or J1+ (I am ignoring the distance from the eye at which the chart is held).

    .

    With +4.00 reading glasses, I can even read the 2-point letters using my distance eye. I imagine with a sufficiently powerful prescription, one could read even smaller print. 2-point is pretty tiny - it's the smallest size my word processing software will print - and I don't think anyone will need to consider anything smaller.

    .

    J1 appears to be roughly equivalent to the 4.3-point-font line in my homemade chart. I hope to be able to read that one after my surgery.

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