A cataract occurs when the protein in the lens of the eye experiences a change in structure and clumps together. When this happens, a cloudy, opaque layer forms over the lens and prevents light reaching the retina at the back of the eye. This deteriorates the quality of your vision, and if left untreated, you can experience total loss of vision. A cataract can form in
- If you've recently had your eyes tested and need a new lens prescription, you may be wondering if you can opt to have new lenses fitted to your existing frames rather than buying a whole new set of glasses. This may suit you if you really like your current frames and can't find a new pair in a similar style. Alternatively, you may simply want to save money by buying n