A nurse is assessing a client with clinical manifestations associated with scleroderma.
The nurse would use what tool to assist with assessment of this client?

Choice A rationale

Vision changes resulting from retinal tissue pulling away from the underlying choroid describe a retinal detachment. This is a medical emergency characterized by sudden flashes of light, floaters, or a curtain-like shadow over the visual field. Open-angle glaucoma is a chronic, progressive condition rather than an acute mechanical separation of the retina. The pathology of glaucoma involves the optic nerve head rather than the total detachment of the neurosensory retinal layers from blood supply.

Choice B rationale

A cloudy lens that alters the passage of light describes a cataract. Cataracts lead to a gradual, painless blurring of vision and increased glare sensitivity as the proteins in the lens clump together. While both cataracts and glaucoma are common in aging populations, they have different mechanisms. Glaucoma specifically involves the drainage of aqueous humor and the resulting pressure on the optic nerve, whereas cataracts are strictly an opacity issue within the crystalline lens structure.

Choice C rationale

Open-angle glaucoma is characterized by a slow, progressive increase in intraocular pressure, typically ranging above the normal 10 to 21 mmHg. This pressure occurs because the aqueous humor cannot drain efficiently through the trabecular meshwork. Over time, the elevated pressure damages the optic nerve fibers, leading to a gradual loss of peripheral vision, often called tunnel vision. Because this happens slowly and painlessly, many patients remain asymptomatic until significant permanent visual loss occurs.

Choice D rationale

Blood vessels leaking fluid or blood under the retina is characteristic of wet macular degeneration. This condition involves neovascularization, where fragile new blood vessels grow and leak, causing rapid and severe central vision loss. In contrast, open-angle glaucoma affects the peripheral vision first and is related to fluid pressure within the anterior chamber of the eye rather than subretinal hemorrhaging or exudative processes in the macula. Glaucoma management focuses on lowering intraocular pressure.

Choice A rationale

Hypertension is a known risk factor for the development of glaucoma because high systemic blood pressure can damage the delicate microvasculature of the optic nerve. Impaired blood flow or high vascular resistance within the eye contributes to the progression of optic neuropathy. Maintaining a blood pressure within the normal range of less than 120/80 mmHg is essential for ocular health. Chronic vascular stress increases the vulnerability of the eye to pressure changes.

Choice B rationale

Glaucoma is characterized by an increase in intraocular pressure, not a decrease. Normal intraocular pressure ranges from 10 to 21 mmHg. When the drainage of aqueous humor is obstructed, the pressure rises, which compresses the retinal ganglion cells and the optic nerve. A sudden decrease in pressure is not a typical risk factor for glaucoma; rather, elevated or fluctuating high pressure is the primary mechanism that leads to the loss of peripheral vision.

Choice C rationale

Genetic predisposition plays a significant role in the etiology of glaucoma. Individuals with a positive family history of the disease have a much higher risk of developing it themselves. Specific genetic mutations can affect the structural integrity of the trabecular meshwork or the sensitivity of the optic nerve to pressure. Understanding family medical history allows for earlier screening and intervention, which is crucial because the vision loss associated with glaucoma is irreversible.

Choice D rationale

Advancing age is one of the most significant risk factors for glaucoma. As individuals get older, the efficiency of the aqueous humor drainage system often declines, leading to a gradual increase in intraocular pressure. This is especially true for individuals over the age of 60. Changes in the collagen structure of the eye and cumulative oxidative stress over decades make the optic nerve more susceptible to damage from even moderate pressure elevations.

Choice E rationale

Diabetes mellitus is a systemic metabolic disorder that increases the risk of primary open-angle glaucoma. High blood glucose levels over time can cause damage to the blood vessels in the retina and may lead to the growth of abnormal new blood vessels that block the drainage angles of the eye. This is known as neovascular glaucoma. Diabetics must undergo regular comprehensive eye exams to monitor for both retinopathy and elevations in intraocular pressure.