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Do you mean on the lids or inside the eye?
There are 2 possibilities. The first one is asteroid hyalosis in which small spherical white bodies resembling snowball may be seen. It is associated with diabetes and raised cholesterol. Usually no treatment is required but if the vision is markedly reduced then vitrectomy surgery may be done but this is a big surgery so usually avoided. The second possibility is synchysis scintillans in which there is a deposition of freely floating highly refractile cholesterol crystals in the back of the eye(vitreous). "Golden shower" may be seen during movements of the eye. No treatment is usually indicated. This condition may be seen in eyes which have suffered trauma or inflammation. You can discuss with your ophthalmologist. Thanks and best wishes.
You are most likely to have asteroid hyalosis. Although it is progressive in nature but it almost never leads to severe vision loss. To read more about this you can follow this link - http://legacy.revoptom.com/handbook/oct02_sec5_2.htm. Thanks and regards.