What Does -2.75 (Minus 2.75) Eye Power Mean?
Quick answer. -2.75 means you are nearsighted (mild myopia). Light focuses in front of the retina, so distant things look blurry while close-up vision stays clear. Without glasses you see clearly up to about 36 cm / 14 inches. Not safely – this level usually does not meet the legal driving standard uncorrected, so wear your glasses or contacts to drive.
Mild myopia (-0.25 to -3.00)
Where this sits on the myopia/hyperopia scale
What you can and can't see
Can see clearly up to
36 cm / 14 inches
Can you drive with this prescription?
You'll typically want correction for:
- driving
- watching TV
- seeing distant objects
- the cinema or theatre
- the whiteboard in class
Can you drive with this prescription?
Not safely – this level usually does not meet the legal driving standard uncorrected, so wear your glasses or contacts to drive.
Contact lens power
At -2.75, glasses and contact-lens powers are the same – no vertex adjustment is needed below +/-4.00.
Check another value
Enter any sphere (SPH) power to open its page:
What SPH, CYL and AXIS mean
- SPH (Sphere)
- The main lens power that corrects nearsightedness (minus) or farsightedness (plus). This is the number this page decodes.
- CYL (Cylinder)
- Extra power that corrects astigmatism. A blank or 0 means none.
- AXIS
- The angle (1-180 deg) where the cylinder power is placed. Only relevant if you have a CYL value.
- OD / OS
- OD = right eye, OS = left eye. Each eye can have a different SPH.
Why this matters
Knowing what -2.75 means helps you understand your own eyes, compare glasses and contact-lens options, and ask better questions at your next eye test. The number itself is just a measure of focusing power – it does not describe eye health, which only an exam can assess.
Frequently asked questions
Is -2.75 a strong eye prescription?
-2.75 falls in the mild range: Mild myopia (-0.25 to -3.00). -2.75 prescriptions are mild on the overall scale.
Can I drive with -2.75?
Not safely – this level usually does not meet the legal driving standard uncorrected, so wear your glasses or contacts to drive.
Is -2.75 myopia or hyperopia?
-2.75 is mild myopia. The minus sign tells you the type.
Will -2.75 get worse over time?
A single reading does not predict change. Prescriptions can shift, especially in children and teens, so book regular eye exams to track it.
Nearby prescription values
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Open the full Eye Prescription Decoder
This tool explains what your numbers mean in plain language. It is educational only and not a substitute for an eye exam. Always see a qualified optometrist or ophthalmologist for diagnosis and a prescription.
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