Well, so sorry to hear that you have some problems. But take it easy, because that does not prevent you from wearing a pair of nice-looking sunglasses. Actually, you should consult an eye doctor and follow his instructions. The professional would give you right information. But generally speaking, keratoconus could be quite compatible with sunglasses, they do not contradict.
It is so bad for you to get keratoconus. The eye disease often causes highly irregular myopic astigmatism and different degrees of visual impairment, without inflammation. It is often happened among women around the age of youth. You will get the refractive error at the first place like myopia. Then it is gradually developed into astigmatism or irregular astigmatism. As we know, the general lens can be corrected. The medium-term vision declines further, generally lens not correct. What you can use is the contact lens vision correction. You could also use the slit lamp examination to see the top of the central cornea gradually thinning, push out and so on. After the elastic layer fracture, the aqueous humor intrusion, corneal stromal edema and opacity can occur.Then the apex often form irregular linear scar or muddy cornea. You could use the ray ban sunglasses to wear to protect your eyes from the strong sun lights. They are very suitable. The design of them is fashionable which will make you stand at the front line of the fashion.
Yes, of course you can.
Since you have keratoconus, you must know that you need a pair of frame glasses or rigid gas permeable to correct your vision.
1. If you are wearing rigid gas permeable to correct your vision, just buy an additional pair of plano sunglasses to shield the sunshine.
2. If you are wearing frame glasses to correct your your vision, you have two options. One is to have the plano sunglasses clipped on your present one. The other is to add an ultraviolet coating to your present prescription glasses.