Test Your Eyes
Consider placing the diagram on the right in front of you, with the center point at eye level, at a comfortable reading distance, and in a well-lit environment. Wear your reading glasses or contact lenses if you typically wear them.
Put your hand over one eye and use the open eye to concentrate on the center point. Check to see if you can make out the large square's four corners in the diagram. Apply once more separately for each eye. You might have age-related macular degeneration disease if you can't see around every corner or if the lines are wavy, blurry, or fluctuate. As soon as possible, consult an ophthalmologist with expertise in retinal diseases.