Exercises with Mechanical Devices
If you notice scratches on them, have them removed. Hard lenses are less expensive but they are unsuitable for sensitive eyes.
Soft lenses look like drops of water. They are made of hydrophilic plastic polymer and are more comfortable than hard lenses. They also last longer.
Coloured contact lenses are used by film stars, or by people whose cornea is damaged. Contact lenses should be used only after consulting an eye specialist. Never keep them on while sleeping, and do not use them when eyesare inflamed. Take proper care of the lenses and keep them in their cases. Some lenses last one year. Never over use them. Whenever there is a problem consult your eye specialist.
