subject: Introduction on soft contact lenses Introduction on soft contact lenses [print this page] Introduction on soft contact lenses Introduction on soft contact lenses
Nowadays, there are a wide range of people who wear soft contact lenses in order to help them to see clearly. With the help of soft contact lenses, people no longer need to worry the glasses will influence their appearance or show their weakness to others, moreover, compared with hard contact lenses, soft contact lenses are very comfortable to wear. Therefore, soft contact lenses are very popular all over the world. The following will give some introduction on soft contact lenses, read ahead if you want to learn more about it.
There are a wide range of soft contact lenses available on the market in different brands, functions and designs. No matter you have nearsightedness, farsightedness, astigmatism, or presbyopia, you can always find one to satisfy your needs. But make sure that soft contact lenses need to be purchased on the base of the prescription given by our eye doctor. Eye doctor will use a single number to describe lens power and soft spherical single vision contact lenses are measured in the power increments of 0.25D. For example, if our current contact lens power is +1.5D, and the higher prescription we will need is +1.75D.
For people with dry eyes, they will feel easily irritated to wear contact lenses. The best way to make the soft contact lenses comfortable to wear is to reduce the water content in the lens. There is 50% to 60% water content in traditional contacts, while modern silicon hydro gel can only contain 30% water. Besides, in order to keep the soft contact lenses moist, there are also new polymers on the lenses.
Compared with hard contact lenses, soft contact lenses are more comfortable to wear as there is more water content from 25% to 79%, and they are gas permeable in order to make more oxygen to get through the lens into our eyes. While at the same time, soft contact lenses are not as sturdy and durable as hard ones. As it is more gas permeable, protein and bacteria are more likely to build up on the lens, which will cause eye irritation and infection.
The proper care of soft contact lenses is critically important. We should follow our eye doctor's instructions to clean and maintain the lenses in proper way. And we should not have our lens dry up. After removing the lenses, we should keep it in the solution. And when we catch cold, or infections, it is wise not to wear contact lenses, but to wear a pair of glasses instead. And when we have eye make-up, we should wear our contact lenses first. As the lens is sensitive to some deodorants and hair sprays, so we should close our eyes tightly while having the hair sprays. Moreover, we should never forget to change the soft contact lenses according to its schedule.
