What is the average contact lens prescription

The Axis is always a number between 0 and degrees. Addition ADD : If you suffer from presbyopia it affects your near vision, the Addition figure determines what level of correction you need to be able to see clearly at a close distance. This is a number between 0. Dominant : Multifocal or bifocal contact lens wearers will see that the correction is determined by a dominant and non-dominant eye.

This is the dominant figure, and is usually marked with a "D" and "N" to express which eye is which. Contact Lenses by Brand. Contact Lenses by Type. Eye Care. The contact lens values are determined by your optician or ophthalmologist using various tests and measuring methods. Only thanks to an accurate prescription can you buy the right lenses. Please note that all parameters are checked for accuracy every 6—12 months. Vision and eyesight can change throughout life, so fitting is important.

If you feel that your vision has changed, you should have your contact lens values checked immediately. The contact lens prescription and the spectacle prescription differ from each other in a way that spectacle lenses are worn about 12 millimetres in front of the eyes, while contact lenses are placed directly on the surface of the eye. However, if you have a visual impairment, it is necessary to determine both prescriptions so that perfect vision is possible.

So if you want to wear glasses from time to time, be careful not to mix up the prescriptions. Also, the method of measurement for glasses and contact lenses differs slightly, as the distance between the eyes must be measured for the glasses prescription. In addition to your eyes' essential values, you will find the water content on the package of your contact lenses, as well as the oxygen permeability.

The drier your eyes are, the lower the water content of the contact lens should be. Contact lenses with a high water content have the unfavourable property of evaporating water when worn for a long time, thus removing moisture from the eye.

So you should pay attention to the right material: Hydrogel contact lenses have a high water content, which evaporates quickly and thus draws a lot of moisture out of the tear film. Can you swim with contacts? Awkward Contact Lens Moments.

Extended Wear Contact Lenses Guide. Are contact lenses safe to wear? Can I sleep or nap with contact lenses in? How to get a lost or stuck contact lens out of your eye. Can you convert a glasses prescription to a contact lens prescription? Why you should cancel your contact lens direct debit scheme. How to recycle your contact lenses for The importance of contact lens hygiene.

Contact lenses and plastic pollution — How to properly dispose of your lenses. National Eye Exam Month. A guide on how to buy Tesco contact lenses for less.

A beginner's guide to wearing contact lenses. Contact Lenses vs Glasses. Are monthly or daily contacts better? Reasons to remember your contacts this Christmas. There is a wide range in the numbers in contact prescriptions, but some measurements have an average in the power, curve and size of the contact lenses. Power is the strength of the contact lens, the part that magnifies and helps correct vision. According to the Ohio State University Medical Center, although contact lenses are similar to a spectacle prescription, contact lens measurements usually have different numbers 1 4 5.

Power is written as a unit of measurement called a diopter. Diopters can range from 0. Plus is for farsighted and minus is for nearsighted. The average number for both far and nearsighted is 3.