What are some precautions to be taken for glaucoma?

Use meds. Use the eye drops regularly to prevent further optic nerve damage. Good general health preservation is good in any disease. If you have closable angles be very careful not to take any meds such as antihistamines that could dilate the pupils also make sure no one dilates your eyes at the eye doctors office by mistake.
Eye exams. Some risk factors can not be changed, such as age, family history, and race. Regular ophthalmology exams can help detect if there is any evidence of glaucoma. It can be slowly progressive in its most common form, and if detected proper treatment and continued follow-up exams are necessary to monitor the condition.