Digestive 
Blood
Cardiovascular
Dermatology
Genitourinary,
Hormones
Infections
Oncology and
Musculo-skeletal
Mental health and
Parasites
Respiratory
Senses
Various
The Amsler Grid test is a simple test used by ophthalmologists to assess the patient's central vision.
It is a grid of parallel straight lines with a dot in the centre. The grid is placed about 30 inches in front of the patient who must stare at the black centre point with one eye, covering the other eye with his hand. This is then repeated with the other eye.
If the patient suffers from macular degeneration, he will not see straight lines, rather his vision will make him perceive the lines as wavy, distorted (Metamorphopsia), murky and sometimes even as if missing pieces of the trellis diagram and the focus point will look like a fuzzy patch within the box. This is indicative that there may be disease and you should consult your ophthalmologist preferred-urgently.
