Top
10
Doctor insights on: Are Contact Lenses A Different Prescription Than My Glasses

Share
1

1
Are contact lenses a different prescription than my glasses?

Are contact lenses a different prescription than my glasses?

Yes: Contact lens also has size of size of cornea, in addition to power. That's why contact lens have to be 'fitted'. The power may differ also, if the myopia is significant. ...Read more

Dr. Tim Conrad
761 doctors shared insights

Glasses (Definition)

Glasses is a term that describes a pair of lenses that are placed in a frame to be worn to correct faulty vision ...Read more


2

2
Why is my contact lens and glasses prescription different?

Why is my contact lens and glasses prescription different?

Numbers game: Fitting cl is an art form as much as science. When the eyeglass refraction is placed in a cl if the number is large enough the strength of the contact may be different to cause good vision. The fit can also change the numbers. These are called "fudge factors'. The numbers are not as important as the ability to see wella nd comfortably. ...Read more

See 2 more doctor answers
4

4
My contact lens prescription is different from my glasses prescription. Is it supposed to be like that?

My contact lens prescription is different from my glasses prescription. Is it supposed to be like that?

Yes: The optical principle is lens effectivity. As any lens is moved away from your eye it becomes inherently more powerful (positive) the inverse is also true, as a lens is moved to eye, becomes weaker (negative). So contacts and glasses are adjusted accordingly only if it will affect the final clinical outcome. ...Read more

See 1 more doctor answer
5

5
Should I use my glasses prescription for contact lenses?

Should I use my glasses prescription for contact lenses?

Naah: Usually a little different, especially as the prescription number gets higher. Also, you have to be fitted with a right fit, not just prescription power. ...Read more

See 1 more doctor answer
7

7
Are optometrists able to tell what my contact lens prescription are by just looking at your glasses?

No: Fitting of contact lenses involves more than just the power of your corrective lenses. The corneal curvature, size of your cornea and general health of the anterior surface of your eye are taken into consideration. How your eye tolerates a specific contact lens is determined during the followup phase of your fitting. ...Read more

See 1 more doctor answer
8

8
Is it okay to convert my glasses prescription to my contact lens prescription?

Is it okay to convert my glasses prescription to my contact lens prescription?

Not really: The contact lens rx is determined from a refraction for glasses - sometimes trial fitting is necessary since the actual numbers are different due to an optical property called vertex distance. ...Read more

See 1 more doctor answer
9

9
What would you suggest I do to convert my glasses prescription to contact lens prescription?

Slightly tricky: Mostly straightforward if there is no astigmatism but a little involved if there is astigmatism. I assume you are ordering lenses online and will need that conversion. There is also some experience functions depending upon the type of lens. Check with your ophthalmologist to get this done for you. Optometrists are unlikely to do it as they prefer to sell you lenses. ...Read more

10

10
Could you tell me if my contact lens prescription is -4.00/-4.50 what is my glasses prescription?

Close: Commonly it is slightly higer like -4.50 and -5.00 but this depends in part on the goal and how long since your last examination. Also at your age there is the issue of bifocals due to near vision needs. Useful to check with your ophthalmologist for the best information on this. ...Read more