Eyesight numbers · −2.75 explained
Is −2.75 eyesight bad?
−2.75 on the glasses paperwork means the bare eye focuses sharply out to about 36 cm (14.3 inches), about book-reading distance, and softens beyond that. That is the mild band (−0.25 to −3.00): distance softens, the close-up world is untouched.
Your glasses number
−2.75diopters
Sharp out to 36 cm bare-eyed. On a wall chart that lands around 20/150 to 20/250 approximate. With the glasses on, vision at this number is typically a full 20/20.
−2.75 eye prescription, how bad is that?
On the usual scale it is mild. That is the mild band (−0.25 to −3.00): distance softens, the close-up world is untouched. The number says how far you see without lenses, nothing about how healthy the eye is: a −2.75 eye with the glasses on typically reads a full 20/20 line, and every quarter step either way moves the bare-eye horizon a little.
Where does the blur start at −2.75?
Bare-eyed at −2.75, everything closer than 36 cm is sharp edge to edge. Right at 36 cm the edges start to soften, and past it detail fades rather than disappearing. Inside the horizon: a phone held normally (30 cm). Past it: a book (40 cm), a laptop screen (60 cm), a face across a table (1.2 m), a TV across a small room (2.5 m), a street sign (10 m).
The arithmetic is one line: 100 divided by the number gives the sharp distance in centimeters. 100 ÷ 2.75 = 36.4 cm. Every quarter step on the paperwork moves that horizon, which is why the pages either side of this one read differently.
What glasses number for a computer screen at −2.75?
A lens that focuses exactly at a 60 cm screen would be about −1.00 (the full number less 1.67). The EndMyopia starting point for a close-up pair is −1.50, the full number less 1.25, which leaves the screen just inside the sharp range with a little blur at the far edge.
Try another glasses number
−2.75
- Sharp out to
- 36 cm
- 14.3 in, about book-reading distance
- Chart line, bare-eyed
- 20/150
- 20/150 to 20/250, approximate
The numbers either side
What to do with your number
The full method is a structured 90-day program — proper lenses, measured progress, the things only experience can tune.
EndMyopia members work on lowering their glasses numbers step by step. The whole thing — your numbers explained, lens recommendations, daily habits, weekly check-ins — lives inside BackTo20/20. Full Program $1,788 $149/mo × 12 · lifetime access · money-back guarantee.
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Or keep exploring with the free Eyeball Analyzer (20 minutes, your numbers, what they mean).
Limitations & disclaimer
EndMyopia treats myopia as a refractive state, not a medical condition. This is a free educational tool — not medical advice, diagnosis, or a substitute for a licensed optometrist. Measurements depend on camera quality and how carefully you mark the card edges; expect ±5–10 % on laptops, ±10–15 % on phones. For lens orders, eye health concerns, or any task requiring full 20/20 vision, see a licensed professional.
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