What is the cause of high eye pressure and what can be done to prevent worsening? (i have no symptoms). but reading says 19 mmhg on the left eye and 21.8 mmhg on the right eye. i have perfect eyesight?

https://www.glaucoma.org/gleams/high-eye-pressure-and-glaucoma.php https://www.glaucoma.org/gleams/glaucoma-medications-and-their-side-effects.php Elevated intraocular pressure can result in limited vision , initially peripherally which may not be noticed and eventually blindness. There are medications to treat the pressure ( see above), or laser or surgery. F/u/ w/ ophthalmologist.

See ophthalmologist for pressure reading with applanation and exam of optic nerves. Many false readings occur with air puff measuring devices used by optometrists. Squeezing the eyelids while being measured also falsely increases the reading. If there is any optic nerve damage, pressure is actually high, this is easily treated with laser or drops. Causes: heredity, trauma, inflammation, others.