Your questions answered: Eye care
Published 01/11/2010 | 04:56
Optometrists and dispensing opticians at Specsavers use their wealth of experience every day to advise our customers. Here they answer some common queries about glasses and contact lenses.
Q - My glasses don’t fit properly and slip down my nose. Does this matter?
A Badly-fitting glasses can affect vision. If the lenses are too far from your eyes the glasses will seem too weak if you are short-sighted, or too strong if long-sighted. Fit is also vital for bifocals and varifocals wearers, due to the different prescription zones. Glasses should also be comfortable.
Q - My high prescription makes my glasses lenses thick, ugly and uncomfortable. Can anything be done?
A – Specsavers Thin+Light lenses will make a huge difference. They are thinner and lighter than standard, and so are more comfortable and improve the appearance of your glasses. They are suitable for all frames, particularly lightweight styles. The good news is that Specsavers has slashed the prices – Thin+Light lenses cost from £40.
Q - My colleague wears different glasses for working at a computer. Does everyone need them?
A - Using a computer for long periods can cause headaches. Shifting your gaze from screen to keyboard means your eyes have to change focus quickly, resulting in eyestrain. Specially-tailored glasses can help, including lenses that correct your vision at the intermediate distance between your eyes and the screen or tints and lens treatments to reduce screen glare.
Q - What is astigmatism?
A - If the front surface of the eyeball, known as the cornea, is irregularly curved, it cannot focus all the light rays to one point. This causes blurred vision at all distances. Astigmatism often occurs with other vision conditions, such as long or short sight.
Q – I want to try contact lenses, but am worried I might not be able to wear them. What do you recommend?
A - Soft contact lenses would be a good first option. These are the most popular type worn today. In being very pliable and soft, they are easy to get used to and comfortable to wear. Soft contact lenses are suitable for occasional use and even people with sensitive eyes can usually get on with them. As they are not easily dislodged they are also ideal for sport.
Q - Why are my contact lens and glasses prescriptions different?
A – Contact lenses float on the surface, but glasses lenses are several millimetres further away. To ensure clear vision your prescription is very precisely measured and these few millimetres can make a difference to the lens strength needed.