A nurse is collecting data from a client who has open-angle glaucoma. Which of the following symptoms should the nurse expect the patient to report?

The correct answer is A: Gradual loss of peripheral vision. In open-angle glaucoma, the drainage angle of the eye becomes blocked over time, leading to increased intraocular pressure and damage to the optic nerve. This results in a gradual loss of peripheral vision. Choice B, gradual loss of central vision, is more characteristic of macular degeneration. Choice C, sudden headache and nausea, is more indicative of acute angle-closure glaucoma. Choice D, cloudy blurred vision, is not typically associated with open-angle glaucoma.