What are common symptoms of raised intraocular pressure (IOP)?

Raised intraocular pressure (IOP) is often associated with conditions such as glaucoma, and can lead to significant eye health issues if not managed properly. The symptoms of pain, redness, and corneal edema can directly result from the stress that elevated pressure puts on the eye structures. Pain can arise from the tension in the eye or other complications, while redness may indicate irritation or inflammation caused by the increased pressure. Corneal edema, which is the swelling of the cornea, can happen when fluid accumulates as a result of poor drainage or other issues related to elevated IOP, affecting the clarity and health of the cornea. Together, these symptoms signal a potential acute situation that requires prompt assessment and treatment.

While other symptoms mentioned in the choices can be related to various eye conditions, they are not specific indicators of raised IOP. For instance, visual acuity loss and photophobia are often associated with retinal or optic nerve conditions, dry eyes and tearing pertain more to surface issues or systemic conditions affecting tear production rather than IOP, and night vision difficulties along with halos around lights often link to cataracts or refractive errors instead of being direct symptoms of elevated IOP. Thus, the symptoms of pain, redness, and corneal edema are