Glasses are not typically made from glass, but from plastic. This allows a higher absorption of UV rays, and transmits visible light far better than glass does. The plastic also refracts better than glass, which allows for more accurate vision correction. Some lenses also compensate for irregularities that naturally occur on the eyes surface, allowing for sharper vision and reduction in visible halos around bright objects.
LASIK surgery can also achieve this, but while LASIK is becoming more popular, glasses are still very commonly used. Technology has advanced greatly, and because of their prominence on the wearers face they are also a fashion item. They can become a powerful aspect of personal expression, and some celebrities even choose to wear glasses with clear lenses long after undergoing LASIK because of their recognition while wearing them.
Glasses are also commonly fitted with magnifying lenses to aid in reading, where presbyopia or hyperopia are present, and can be specially made for specific conditions and circumstances. Multi-focus lenses are generally used to allow for clear vision of objects at all distances from the wearer. Traditionally, these had two or three sections of the lens, adjusted to different distances. Progressive lenses have improved greatly on this technique, and transition smoothly between the focal distances.
Potential downsides to choosing glasses include costly repair in case of breakage or scraping, and a high sensitivity to temperature change which can fog the lens. They can also be inconvenient when performing more physically demanding activities.
For more information, please call either or of our convenient optical locations.
Bel Air Optical: 443-643-4505
Havre de Grace Optical: 410-942-9470