The lens moves
An optimally fitting lens must be able to constantly move over the surface of the eye. Only this mobility guarantees optimal tolerability. With each closing and opening of the eyelids the lens is drawn upwards. While the eye remains open the lens moves slowly downwards until the next closing of the eyelid. It is therefore normal that the vision is sometimes blurred or is alternately sharp and out of focus. After a certain period of adaptation the blurred images are forced out by the brain and the vision returns to normal.
Feeling the presence of the lens
It is absolutely normal that at the beginning one actually feels the lens (especially on the lower edge of the eyelid). As the two eyes are not always equally sensitive, it is absolutely normal that you may feel one lens more than the other. This "foreign body" feeling disappears after a few days, at the latest after one to two weeks.
Reading is an effort
At the beginning, new lens-wearers have difficulty with reading or sewing. The reason for this difficulty is that at the beginning more demands are placed on the reading muscle and it tires more rapidly. The print then appears blurred. This is a normal symptom of adaptation to the lens. Short-sighted persons who rarely wore their spectacles for reading and lens-wearers over the age of forty have more difficulties. Most lens-wearers over the age of forty-five also need additional reading-glasses. How long these reading difficulties persist differs from person to person. Often they last for a few days, but in stubborn cases for several weeks. The more one reads, the better the near vision becomes.
Burning sensation, stinging, very red eyes, clouded vision, marked "foreign body" feeling, unusual secretions (appearing after a certain time or towards the end of the maximum wearing time).
(If any of these symptoms appears, you must remove the lenses immediately and inform us by telephone or at your next visit. This does not mean that you do not tolerate the contact lenses, but rather that you have exceeded the maximum wearing time and/or that the lenses you are now wearing are no longer optimally adapted for your eyes. The lenses will probably be either altered or exchanged at your next visit.
Burning sensation, itching, marked "foreign body" feeling (immediately after the lenses have been placed on the eyes)
(If these symptoms appear immediately after the lenses have been placed on the eyes, the causes may be the following:
1. The lens has not been cleaned sufficiently.
2. Cosmetics, dirt, nicotine or drugs have been passed from the hand onto the lens
3. Foreign bodies (dust, fibres, eyelashes etc.) have got between the lens and the eye.
4. The lens is defective.
5. The lens has been placed on the eye upside down.
6. The lens has been kept in the wrong solution.
In all these cases the lens must be removed immediately and checked to see whether it is defective. The hands must be thoroughly washed and the lens cleaned again. Then rinse the lens and replace it in the eye. This procedure may perhaps have to be repeated several times until the lens neither feels uncomfortable nor causes a burning sensation. A defective lens must not be used again.