a flowering plant whose stem above ground does not become woody. 2. such a plant when valued for its medicinal properties, flavor, scent, or the like. 3. Often, the herb. Slang. marijuana.
Retinal detachment is a disorder of the eye in which the retina peels away from its underlying layer of support tissue.Initial detachment may be localized or broad, but without rapid treatment the entire retina may detach, leading to vision loss and blindness. It is almost always classified as a medical emergency.Permanent damage may occur if the detachment is not repaired within 24â72 hours.nitial detachment may be localized or broad, but without rapid treatment the entire retina may detach, leading to vision loss and blindness. It is almost always classified as a medical emergency. Permanent damage may occur if the detachment is not repaired within 24â72 hours.
The retina works with the cornea, lens, and other parts of the eye and the brain to produce normal vision. Retinal detachment occurs when the retina separates from the back of the eye. This causes loss of vision that can be partial or total, depending on how much of the retina is detached.Retinal detachment is a medical emergency.he retina works with the cornea, lens, and other parts of the eye and the brain to produce normal vision. Retinal detachment occurs when the retina separates from the back of the eye. This causes loss of vision that can be partial or total, depending on how much of the retina is detached.