Soft contact lenses
Soft contact lenses are made of soft, flexible plastics that allow oxygen to pass through to the cornea. Soft contact lenses may be easier to adjust to and are more comfortable than rigid gas permeable lenses. Newer soft lens materials include silicone-hydrogels to provide more oxygen to your eye while you wear your lenses.
The plastic lenses are manufactured from hard resin. These lenses are half the weight of glass lenses and can be tinted to almost any color and density. Plastic lenses are more vulnerable to scratches than glass lens. But it can have an optional scratch protection applied.They are easier to handle and less likely to tear.
Frames can be made from many different types of metals and plastics.The drawbacks to plastic frames are that they break more easily than metal frames but they are ideal for people who are susceptible to allergies. Plastic frames may also get slightly weaker with sun exposure. Most frames for eye glasses are made of metal.