{"id":7984,"date":"2026-06-14T18:35:38","date_gmt":"2026-06-14T23:35:38","guid":{"rendered":"https:\/\/justinparrtech.com\/JustinParr-Tech\/?p=7984"},"modified":"2026-06-14T18:35:38","modified_gmt":"2026-06-14T23:35:38","slug":"eye-chart-font-sizes","status":"publish","type":"post","link":"https:\/\/justinparrtech.com\/JustinParr-Tech\/eye-chart-font-sizes\/","title":{"rendered":"Eye Chart Font Sizes"},"content":{"rendered":"

As a practical joke, I’m making an eye test chart for a friend.\u00a0 However, apparently there is no “one standard” for font sizes on an eye test chart (called a Snellen acuity test chart), and the details are a giant secret.<\/p>\n

Well, for anyone who has ever wanted to make an eye test chart, HERE are the specifications.<\/p>\n\n\n\n
Warning:<\/strong><\/span><\/p>\n

This is not medical advice – always consult a licensed medical professional who will use actual medical equipment.\u00a0 My version of the “eye chart” constitutes a joke and is not intended for medical use.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

First of all, there is a free OpenType font called “Optician”.\u00a0 Google for it, download for free, and put it in your Windows\/system32\/fonts or \/usr\/share\/fonts\/opentype folder.<\/p>\n

Second, here are the font sizes:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Row<\/th>\nDistance<\/th>\nFont Size<\/th>\nSample (size only)<\/th>\nSymbols<\/th>\nChar Spacing<\/th>\nSpaces<\/th>\n<\/tr>\n
1<\/td>\n20\/200<\/td>\n155pt<\/td>\n\n
A<\/div>\n<\/td>\n
1<\/td>\nn\/a<\/td>\nn\/a<\/td>\n<\/tr>\n
2<\/td>\n20\/100<\/td>\n102pt<\/td>\n\n
A<\/div>\n<\/td>\n
2<\/td>\n84pt<\/td>\n2<\/td>\n<\/tr>\n
3<\/td>\n20\/70<\/td>\n72pt<\/td>\n\n
A<\/div>\n<\/td>\n
3<\/td>\n57pt<\/td>\n2<\/td>\n<\/tr>\n
4<\/td>\n20\/50<\/td>\n52pt<\/td>\n\n
A<\/div>\n<\/td>\n
4<\/td>\n39pt<\/td>\n2<\/td>\n<\/tr>\n
5<\/td>\n20\/40<\/td>\n41pt<\/td>\n\n
A<\/div>\n<\/td>\n
5<\/td>\n32pt<\/td>\n2<\/td>\n<\/tr>\n
6<\/td>\n20\/30<\/td>\n30pt<\/td>\n\n
A<\/div>\n<\/td>\n
6<\/td>\n31pt<\/td>\n2<\/td>\n<\/tr>\n
7<\/td>\n20\/25<\/td>\n26pt<\/td>\n\n
A<\/div>\n<\/td>\n
7<\/td>\n24pt<\/td>\n2<\/td>\n<\/tr>\n
8<\/td>\n20\/20<\/td>\n20pt<\/td>\n\n
A<\/div>\n<\/td>\n
8<\/td>\n18pt<\/td>\n2<\/td>\n<\/tr>\n
9<\/td>\n20\/15<\/td>\n15pt<\/td>\n\n
A<\/div>\n<\/td>\n
8<\/td>\n25pt<\/td>\n2<\/td>\n<\/tr>\n
10<\/td>\n20\/13<\/td>\n12pt<\/td>\n\n
A<\/div>\n<\/td>\n
8<\/td>\n20pt<\/td>\n2<\/td>\n<\/tr>\n
11<\/td>\n20\/10<\/td>\n9pt<\/td>\n\n
A<\/div>\n<\/td>\n
8<\/td>\n16pt<\/td>\n2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \n
  • Font Size<\/strong> – set your font size to this, for each row<\/li>\n
  • Symbols<\/strong> – number of letters on each row<\/li>\n
  • Character Spacing<\/strong> – Set your font size to this, and use TWO spaces between letters.<\/li>\n<\/ul>\n

    For example, on row 5:<\/p>\n

      \n
    • 5 letters<\/li>\n
    • Letter font size: 41pt<\/li>\n
    • Spaces font size: 32pt (use two spaces between letters)<\/li>\n<\/ul>\n

      Congratulations!\u00a0 Now you can make your own eye chart whenever you want, and it’s no longer a secret.<\/p>\n","protected":false},"excerpt":{"rendered":"

      As a practical joke, I’m making an eye test chart for a friend.\u00a0 However, apparently there is no “one standard” for font sizes on an eye test chart (called a Snellen acuity test chart), and the details are a giant secret. Well, for anyone who has ever wanted to make an eye test chart, HERE […]<\/p>\n","protected":false},"author":16,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-7984","post","type-post","status-publish","format-standard","hentry","category-other-stuff"],"_links":{"self":[{"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/posts\/7984","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/comments?post=7984"}],"version-history":[{"count":10,"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/posts\/7984\/revisions"}],"predecessor-version":[{"id":7995,"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/posts\/7984\/revisions\/7995"}],"wp:attachment":[{"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/media?parent=7984"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/categories?post=7984"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/justinparrtech.com\/JustinParr-Tech\/wp-json\/wp\/v2\/tags?post=7984"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}