No – you cannot directly convert a glasses prescription to a contact lens prescription. Equally, you cannot convert a contact lens prescription to a glasses prescription.Apr 3, 2019
Do you need a different eye test for contact lenses?
Why do I need a separate exam for contact lenses? If you plan to wear contact lenses, you'll need a separate eye exam because contact lenses are classified as medical devices. The good news is a contact lens exam can usually be performed at the same time as your comprehensive eye exam.
Are eye prescriptions the same for contacts and glasses?
Contact lens and glasses prescriptions are not the same. A contact lens must match the size and shape of your eye. Therefore, a prescription for contact lenses contains information like base curve and diameter, as well as brand.
Does contact lens exam include eye exam?
A contact lens exam will include both a comprehensive eye exam to check your overall eye health, your general vision prescription and then a contact lens consultation and measurement to determine the proper lens fit.
Are all eye exams the same?
In fact, if a medical problem is detected during the course of your routine eye exam, you would probably have to come back for a separate medical exam and testing at another time, or even get sent elsewhere for it. But eye exams aren't exactly the same as a visit to your regular doctor, either.
Is glasses prescription stronger than contacts?
Since eyeglasses are usually about 12 millimeters from the eye, the prescriptive power of a contact lens — which is positioned directly on the tear film of the eye — will be slightly less nearsighted. This becomes significantly different with prescriptions of 4D or greater.
Why is my vision different between my contacts and glasses?
For patients who wear glasses or contact lenses, they sometimes notice that their vision is different between the two modalities. This is especially true for people with higher prescription numbers. ... The reason for this difference is that when someone wears glasses, image size is being introduced into the equation.Jan 29, 2019
Why is my contact lens prescription higher than glasses?
How Contact Lens Prescriptions Differ. Since eyeglasses are usually about 12 millimeters from the eye, the prescriptive power of a contact lens — which is positioned directly on the tear film of the eye — will be slightly less nearsighted. This becomes significantly different with prescriptions of 4D or greater.