Enough, but not too much. It;s okay to have a plump guinea pig, but overfeeding can kill them. I'd give you guinea pig one handful of dry guinea pig food every day as the main food, and make sure that they have a constant supply of both hay and fresh water.
For these and other reasons, scleral contact lenses can cost significantly more than standard contacts; in fact, it is not uncommon for scleral contacts to cost three or four times more. While not typical, in cases when a complex, highly customized scleral lens is required, cost can be as high as $4,000 per eye or more.Most insurance programs do not automatically cover the full cost of scleral contact lenses. In some cases, vision insurance may reduce the cost of your lenses and/or fitting fee.n comparison, most conventional GP contact lenses are 9.0 to 9.5 mm in diameter and cover only 75 to 80 percent of the cornea. Another category of gas permeable lenses bridges the size gap between conventional GP lenses and mini-sclerals.
Scleral lenses (15mm to 25mm) place all lens bearing on the sclera. Scleral lenses are further subdivided as: mini-scleral lenses (15mm to 18mm) which have a somewhat limited tear reservoir capacity, and full scleral lenses (18mm to 25mm) which have an almost unlimited tear reservoir capacity.