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.
Cost of Contact Lenses Compared With Eyeglasses. Some experts suggest the average cost of prescription eyeglasses is less than $300. If this is true, contact lenses cost more. Also, many people who wear eyeglasses do not purchase new glasses every year. But the cost of eyeglasses can increase significantly if you choose premium features, such as high index lenses, progressive lenses, anti-reflective coating and designer frames. A pair of prescription eyeglasses with all these features can easily exceed $800.