Compared with spectacles
Advantages | Disadvantages* |
Wider field of view | Time required for fitting and adaptation |
Better with asymmetrical prescriptions | Handling skills required by patients |
Better for very high prescriptions | Hygienic procedures and lens disinfection |
Cosmetically superior | Wearing time may be limited |
More practical for sports | Lenses can be lost or broken |
Avoid weather problems | Problems with foreign bodies |
Vocational uses | Deteriorate with use and age |
Therapeutic uses | Maintenance costs |
*Some of these are avoided with daily disposables but with increased expense.
Advantages of soft lenses | Advantages of gas-permeable hard lenses |
Good initial comfort | Excellent vision |
Ease of adaptation | Correct corneal astigmatism |
Long wearing times | Complex designs available |
More difficult to overwear lenses | Ease of maintenance |
Absence of spectacle blur | Fewer solutions allergies |
Good for intermittent wear | High oxygen permeabilities |
Natural facial expression | Do not cover the entire cornea |
Less photophobia | Exchange of tears on blinking |
Fewer problems with foreign bodies | Less risk of infection |
Low risk of loss | Easy to check |