This week is Glaucoma Awareness Week, aimed at increasing understanding of glaucoma, which is the second-most-common cause of blindness worldwide.

One of every 80 people in Melbourne's population is likely to have glaucoma. Older people are more at risk, as are those who have glaucoma in their family history. Most people are affected after the age of 40 and sufferers are predominantly men.

However, regular eye checks can help prevent glaucoma and medication is available for general treatment. Procedures such as laser surgery, as well as surgical operations, may be needed if the disease is severe.

"Often glaucoma is caused where the fluids behind the eye build up, increasing pressure, or when the iris of the eye is covering the canal opening," Dr Samantha StJohn, of OPSM, said.

Overall, it is highly recommended that people over 40 get their eyes checked regularly.

By acting early, there's a higher possibility that doctors will be able to reduce the risk of contracting the disease.