Yoga offers some yogic techniques which if practiced regularly can improve weak eyesight. If followed along with proper diet, results will be faster and better.

1. Netra Shakti Vikasak Kriyas

A. Blink the eyes quickly 10 times. Close and release. Do this at least 100 times in a day.

B. Sit in a comfortable position. Form your right hand into a fist with the thumb upright and in level with your eyes. Fix your gaze on the nail of the right thumb.
Slowly bring the hand towards your eyes then slowly move the hand away from you, maintaining the level and gaze as before. Repeat this three times.

C. Sit in a comfortable position. Light a candle at least 4 feet away from yourself and gaze at the candle. If your eyes water then close them and relax. After a few seconds begin gazing again. Do this at
least 3 times.

D. Rub the palms together till they become warm. Place the palms gently over your eyes, such that no light enters the eyes. Practice this for 1 to 3 minutes.

E. Take a wide mouthed bowl of clean, cold water. Tilt your head downward and put your open right eye in the water and rotate the eyeball. Repeat this with the left eye. Do this 5 times with each eye.

F. Without moving your head or the neck, move the eyeballs up and down. Repeat at least 50 times.

G. Keep your head and back straight. Rotate your eyeballs in a clockwise manner, 5 times; then similarly rotate them anti clock wise.

2. Asana:
Sarvangasana: Lie on your back and relax. Slowly raise legs, hips and trunk upwards in a continuous movement until vertical. Keep the knees straight. Keep the arms on the ground, bending the elbows, support the trunk with your hands. In this posture the chin is buried in the upper chest. Retain this position as long as comfortable. Then come down slowly. Relax. Do this only once.

Benefits: Blood supply increases to organs in the upper part of the body such as eyes, heart, face, thyroid, root of spinal nerves and brain.

Caution: Those suffering from high BP, heart ailments, cervical pain and slipped disc should refrain from doing this asana.