Test for cornea curvature
Cornea curvature (astigmatism) exists if a dot is visualised as a line on the retina. Take the self-test now.
Fasten the four circles in a row and look at the lines. Important: First test each eye individually and then both eyes together. You can take the test with or without glasses.
Do you see clear black lines in all the circles?
If the lines appear blurred in one or more directions, this could indicate irregularities in your eye. In that case, see your optician, ophthalmologist and optometrist. If you notice differences in the lines with your glasses as well, then you should have your glasses checked, because uncorrected astigmatism reduces your visual acuity.