Acute narrow angle glaucoma occurs primarily in patients who have a shallow space between the cornea at the front of the eye and the colored iris that lies just behind the cornea. As the eye ages, the natural lens behind the pupil grows and the pupil becomes smaller, restricting the flow of fluid to the drainage site. Fluid can build up behind the iris, pushing it forward and blocking the channel (angle) that normally allows aqueous fluid to drain. If blockage happens, a rapid rise in intraocular pressure can occur. Pupillary block.  Eye fluid known as the aqueous humor is produced in the ciliary body, which is located behind the iris. Normally, the aqueous flows easily through the pupil into the front or anterior chamber of the eye. But if the back...

Narrow angle glaucoma symptoms usually last as long as the pressure inside the eye remains high.Narrow angle glaucoma is usually very painful because of the sudden increase in pressure inside the eye. In some cases, when the drainage angle is only partially or temporarily blocked, there can be warning attacks such as blurry vision and the appearance of colored halos around lights. Warning attacks can also include severe pain and redness. If the drainage angle is completely blocked, an acute attack will almost certainly develop. Symptoms may include: Inflammation and pain Pressure over the eye Moderate pupil dilation that’s non-reactive to light Cloudy cornea Blurring and decreased visual acuity Extreme sensitivity to light Seeing halos around lights Nausea and/or vomiting In many...