(HealthDay News) -- If you have trouble completing everyday tasks because you can't see well enough -- even while wearing prescription glasses -- you may have what the National Eye Institute calls "low vision."

The institute says while some vision loss is natural as we grow older, low vision is not a normal symptom of aging.

Here are warning signs of low vision:

  • Having trouble recognizing friends' and relatives' faces.
  • Having problems performing tasks that require you to see things up close, including sewing, reading or cooking.
  • Having difficulty matching clothing or distinguishing colors.
  • Having trouble around the house because the lights don't seem as bright as they once were.
  • Having difficulty reading road and street signs or store-front signs.

If you are experiencing any of the above symptoms, make an appointment with your doctor.