What symptom does a driver experience that indicates glaucoma?

In the context of glaucoma, both gradual peripheral vision loss and seeing halos around lights are important symptoms that indicate the presence of this eye condition. Glaucoma typically progresses without noticeable pain, leading to a gradual loss of peripheral vision. This often goes unnoticed by the individual until the condition has advanced significantly. As the disease affects the optic nerve, peripheral vision loss becomes one of the hallmark signs.

Additionally, seeing halos is also a common symptom associated with glaucoma, particularly in the case of angle-closure glaucoma. This occurs due to increased intraocular pressure, which can cause visual disturbances such as halos around lights, especially in low-light conditions.

Recognizing both symptoms is crucial for early diagnosis and treatment of glaucoma, as this can significantly help in preserving the individual's vision. The presence of both symptoms together strengthens the likelihood of a glaucoma diagnosis, which is why the most comprehensive answer includes both gradual peripheral vision loss and seeing halos.