Are contact lenses better than glasses? Why?
For people who need to wear glasses all the time, definitely yes. It's because better and more natural vision, wider visual field, comfortable ears, no coffee fog, no problems in rain, cosmetically advantageous.
Can anyone wear contact lenses?
A small proportion of people are temperamentally unsuitable if the eyes are diseased. Even then, some can benefit from contact lenses, if they are prescribed by a specialist.
What is a cosmetic contact lens?
This is a coloured or cosmetic lens. The material is coloured to simulate a normal eye or cover areas of the eye that need protection; it can also be used to tint the light entering the eye (like sunglasses).
What are the qualities of a successful lens?
Good vision, good tolerance, good positioning ( on the centre of the eye) and no problems with the lids and eyes such as excessive redness.
Are there real dangers of loss of sight or even damage to the eyes and sight from contact lens wear?
The evidence of over a thirty-year period shows that the risks are small. If you are worried that your sight is getting worse, you should talk to your practitoner about it.
Do contact lenses cause allergy?
Lenses themselves will not although their protein coating may. Then, every solution does not suit everybody. Your eyes may become sensitive to a solution at any time, and if this happens you will need advice from your practitioner on changing it.
If my lens is damaged at the edge, can I go on wearing it?
Providing the damage is very slight, so that it neither affects your vision nor irritates you eye or eyelid, you need not replace the lens. A soft lens is less likely to irritate than a hard one when chipped.
Do extremes of temperature and humidity such as hot or cold climates affect wear or damage the lens?
In general no, but dust, wind and excessive glare from the sun do. In dry climates supplementary artificial tear drops and more blinking are necessary.
Can I sleep with my contact lenses in?
Some contact lenses are made especially for all day and night wear. Your practitioner will tell you how many days they can be worn before being taken out and cleaned. If they are not this type do not sleep in them. That can cause irritation.
Why do I see haloes around lights and also sometimes a white flare at the fringe of my vision?
The haloes are very common with contact lens wearers. They happen at night when you are looking at lights, especially when driving a car. While they may be due to lack of 'breathing', they can also be caused by the front of they eye taking up too much water. Even with modern, thin lenses haloes may occur. The white flare is mostly seen by people who wear hard corneal lenses and it is caused by the edge of the lens.