Normally he or she would see an orange-coloured area called the fundus . When the patient has RP, the orange surface is broken by black or brown clumps of pigment. Other tests are available which measure the area of visual field which is still useable and the ability to adapt to low light levels. Many more sophisticated tests are available at eye hospitals and these are explained in detail in the BRPS booklet, 'The Eye Clinic and RP'. Yes, many people with RP do.
Cataracts are a clouding of the lens at the front of the eye.
When they have reached a certain stage, an eye specialist will usually recommend their removal. The lens is then either replaced with an implant, or specially made spectacles are prescribed. After the operation, the patient will still have RP, but if the retina has not deteriorated too far, a limited amount of vision will be restored. This is the most common origin of the 'miracle cure' stories which appear occasionally in the press. Yes, but there are other conditions which people with RP can inherit.