Wavy lines on the Amsler grid
New wavy lines are the most important thing the grid can show you. Here is what to do and what may be behind them.
Updated November 13, 2026 · General information, not medical advice.
What to do first
If lines that used to look straight now look wavy, bent or broken, call your eye doctor right away, the same day if you can. Say “I have new distortion on my Amsler grid.” Those words tell the office you need an urgent appointment. If you cannot reach your doctor, go to an urgent eye clinic or emergency department.
Do not wait a few days to see whether it clears. Do not rely on the other eye making up for it.
Why straight lines look wavy
The macula is a thin, flat layer of light-sensing cells. Your brain assumes the cells are in an even pattern. If fluid, blood or scar tissue lifts or wrinkles part of the macula, the cells in that spot shift, and straight lines that fall on them look bent. Doctors call the symptom metamorphopsia.
Possible causes
- Wet age-related macular degeneration. New, leaky blood vessels grow under the macula. This is the cause doctors most want to rule out, because it can damage sight quickly and is treatable.
- Diabetic macular edema. Fluid leaks into the macula in people with diabetes.
- Macular pucker (epiretinal membrane). A thin sheet of scar tissue wrinkles the surface of the macula. It usually changes slowly.
- Macular hole or vitreomacular traction. The gel inside the eye pulls on the macula.
- Central serous retinopathy. A blister of fluid forms under the macula, often in younger adults.
- Swelling after a retinal vein blockage, inflammation or eye surgery.
So wavy lines do not always mean macular degeneration. They do always mean an eye exam.
What happens at the eye doctor
You will usually have your vision measured, drops to widen your pupils, and an OCT scan, a quick and painless picture of the layers of the retina that shows fluid directly. Sometimes dye pictures of the blood vessels are taken as well. Bring your marked grid, on paper or as an image from the online test.
If the waviness is not new
Many people live with a stable distortion from a macular pucker or old scarring. If your doctor has examined it, keep testing and report any change: a larger area, stronger bending, a new blank spot, or the same thing appearing in the other eye.
Other signs that need same-day care
- a sudden dark or blank spot in the center of your vision;
- sudden blurring in one eye;
- flashes of light, a shower of new floaters, or a curtain over part of your vision.