International health insurance customers might want to take advantage of their access to healthcare services and ensure that they have regular eye tests.
According to recent comments from Cathy Yelf, head of external relations at the Macular Disease Society, eye tests are "not just a check to see if you need glasses".
"Eye tests are an important way to check your general health as well as your eye health," she explained.
The comments follow research which found that over half of adults surveyed claim to have heard of macular disease.
However, only five per cent could name all of the symptoms and 74 per cent were unable to name any of them.
Ms Yelf advised people to have an eye test at least every two years but "more often if you have a family history of eye problems".