How often should adults get an eye test?

How often you need an eye test is a question most people in Nepal only ask once something has already gone wrong. That works, in the sense that a problem eventually gets fixed. It just means living with months of avoidable strain first.

How often an eye test is actually needed: every two years

For an adult under 40 with stable vision and no other risk factors, two years is the right interval. Prescriptions at that age move slowly, and two years is short enough to catch a drift before it becomes a headache habit.

The reason to keep to it even when you feel fine is that vision changes gradually. You do not notice the day the board got harder to read. You notice that you have started sitting closer, or that night driving has quietly become unpleasant. Your brain hides the decline from you, which is exactly why a measurement beats an opinion.

Who should come yearly

Anyone over 40. The eye's own focusing lens stiffens through your forties, and the reading add changes every year or two during that stretch. An old add is why people end up holding menus at arm's length.

Anyone with diabetes. This is the important one. Diabetes affects the small blood vessels at the back of the eye, and the early stages have no symptoms at all. That check is not a sight test, it is a dilated retinal examination at an eye hospital, and it should happen every year without waiting to notice anything.

Anyone with glaucoma in the family. Glaucoma runs in families and steals peripheral vision so slowly that people compensate for years. Family history means yearly pressure checks with an ophthalmologist.

Anyone whose power has been moving. If your last two prescriptions differed by more than about 0.50, you are in a changing phase and yearly makes sense until it settles.

Children and teenagers. Fastest changers of all. A power that shifts during a school year shows up as poor marks long before anyone thinks about eyes. what to expect from a child's first pair of glasses is worth reading before that first test.

Signs to come sooner

Do not wait out the two years if any of these started: headaches that arrive in the afternoon rather than the morning, squinting at number plates or the board, holding your phone further away than you used to, one eye clearly working harder, night driving becoming stressful, or your eyes stinging by the end of a screen day. Each of those is your eyes telling you the current arrangement is not working.

The symptoms that are not an optician's job

Some things should not go to a glasses shop at all, and a shop that sells you frames instead of sending you on is doing you harm.

Go to an eye hospital the same day for sudden loss of vision in one eye, eye pain rather than eye ache, flashes of light, a sudden shower of new floaters, a dark curtain moving across your sight, double vision that appeared suddenly, or a red painful eye with light sensitivity.

That is our policy at both showrooms. If you walk in with one of those, we tell you plainly and send you on rather than taking your money. Our note on cataract signs people mistake for dirty glasses covers the slower changes that are worth mentioning at your next test.

Making it easy

The test is free at both showrooms, Pulchowk in Lalitpur and Boudha in Kathmandu, takes about ten minutes, needs no appointment and carries no obligation to buy. Sunday to Friday, 9:00 to 19:00, and mid-morning is quieter than late afternoon.

Bring your current glasses and any old slip, even a hospital one. If you are due anyway, browse frames from NPR 999 while you are in, or just take the prescription and think about it.

Keeping track between tests

Photograph each prescription slip when you get it and keep them in one album on your phone. Two or three slips side by side tell you something a single test cannot: whether your power is stable, drifting steadily, or jumping. That pattern is genuinely useful to whoever tests you next, and it takes five seconds to build. It also means a lost slip never costs you a repeat test, which matters more than it sounds: without the old numbers, nobody can tell whether your eyes are steady or moving, and that is half of what a test is for.