SILICONE HYDROGEL CONTACT LENSES
A new age of contact lenses has been born in recent years to eliminate two of contact lenses biggest problems, over wear and dryness.
With the working day and week getting longer and an increase in patients demands we regularly see a patients wearing time creeping upwards of 12 hours a day, seven days a week. These long wearing schedules in conventional contact lens materials cause visible problems due to dryness and the reduction of oxygen reaching the eye.
Silicone is permeable and combined with the normal hydrogel material allows the lens to transmit a steady supply of oxygen to the eye thus allowing patient’s longer wearing times. A silicone hydrogel contact lens also has less water making it less susceptible to dryness allowing the patient improved comfort particularly during extended periods of wear.
Some silicone hydrogel lenses also allow up to 30 days and nights of continuous wear meaning the lens can be worn for a whole month at a time giving round the clock clear vision.