There is always something to try until all light perception is lost. No matter how little vision is left, glaucoma should be treated aggressively enough to try to preserve that vision. I have some questions regarding two eye drops used to control glaucoma. I have read that timoptic and propine can have certain side effects. I feel my eye doctor is only concerned with keeping my pressures down and not my general health.
All medications can have side effects.
Not all medications cause side effects in all people. Medications can cause side effects in some people, but not others. Different medications have different side effects and also have different side effects in different people. If you have side effects with one medication, it makes sense to try a different medication. There are a number of different classes of medications marketed now for treatment of glaucoma.