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A Being Patient report profiles Andrew Reid, who was diagnosed with posterior cortical atrophy (PCA), an uncommon dementia syndrome that can first disrupt visual processing rather than memory. The report says PCA is often linked to Alzheimer’s disease, but diagnosis may be delayed because symptoms can resemble eye problems or other conditions. There is no cure, and evidence for treatments specifically for PCA remains limited.
Posterior cortical atrophy (PCA), a dementia syndrome that can initially affect how the brain processes visual information, can be difficult to recognize and diagnose, according to a report by Being Patient. The report follows Andrew Reid, diagnosed at age 56 after persistent visual and spatial difficulties were first treated as other problems; it says Alzheimer’s disease is the underlying cause in about 80% of PCA cases.
PCA affects brain regions toward the back of the brain involved in visual and spatial processing. The resulting difficulties are not necessarily caused by a problem with the eyes. Symptoms described in the report include trouble reading, judging distances, recognizing objects or faces, navigating and driving, as well as sensitivity to bright light and frequently misplacing things. Daily activities such as getting dressed can also become harder.
Reid first noticed trouble seeing his keyboard at work and writing simple emails. After a driving incident, he went to an emergency department and was diagnosed with epilepsy, according to the account. His symptoms continued despite a year of treatment. He later received a PCA diagnosis at a brain clinic. His wife, Karina Reid, described the condition’s effect on eating: “It’s like his brain holds the image for a bit, and then it’s gone.”
The report says PCA can also progress to affect memory, speech, language and executive function. There is currently no cure. Clinicians may use medicines developed for Alzheimer’s or for another underlying condition, depending on the cause, but the report says evidence for their effectiveness specifically in PCA is limited. It also notes that some people with Alzheimer’s-related PCA may be assessed for newer Alzheimer’s drugs, subject to eligibility, while research on their benefit in PCA remains limited.
Why Vision-Led Symptoms Matter
When dementia affects visual processing first, a person may struggle with ordinary tasks even while memory and other abilities remain relatively intact. That can make the condition hard for families and clinicians to recognize, and it can leave people needing a different kind of support from services designed around memory problems. The Being Patient report says PCA can affect mobility, dressing and eating, not just reading or seeing objects.
Misidentifying the source of visual difficulties can delay a neurological assessment. A person may seek help from an eye-care professional, or symptoms may be attributed to an eye condition or another diagnosis. The report does not establish how often this happens across all patients, but it describes diagnostic delay as a recurring concern and cites an expert who says Reid’s experience was not unusual.
Recognition matters for practical care as well as diagnosis. Occupational and physical support can address difficulties with daily activities and moving through the environment, while a clinical evaluation can investigate the underlying cause. The report emphasizes that needs differ from those of people whose dementia begins with prominent memory loss.
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How PCA Is Evaluated
The report places the average age of symptom onset at about 59, while Reid received his diagnosis at 56. PCA is a syndrome rather than a single explanation for every case: Being Patient says Alzheimer’s accounts for about 80% of cases, while other reported causes include dementia with Lewy bodies, prion disease and other neurodegenerative conditions.
According to the report’s summary of expert guidance, evaluation may include a detailed eye examination to rule out eye diseases, blood tests to check for other metabolic conditions, cognitive testing and brain imaging focused on the areas involved in visual-spatial processing. Tests such as blood or cerebrospinal-fluid analysis and amyloid PET imaging may help determine whether Alzheimer’s is the cause. These are elements of an assessment, not a single test that the report says confirms PCA in every case.
Keir Yong, chief investigator of a University College London longitudinal study on PCA, told Being Patient that he is working with the UK Biobank on an optometrist screening test that is being validated across eye and neurology clinics. The report does not provide results showing that the test is ready for routine use.
““PCA sadly can be disabling in different ways.””
— Keir Yong, chief investigator of a University College London PCA study, quoted by Being Patient
Diagnosis and Treatment Questions
The report does not state how long diagnosis takes on average or how frequently PCA is initially mistaken for an eye disorder or another neurological condition. It describes Reid’s case and cites Yong’s view that delayed diagnosis is not unusual, but those details do not establish rates for all patients.
The optometrist screening test mentioned in the report is still being validated; its accuracy, availability and likely effect on diagnosis are not yet reported. Treatment also remains an area of uncertainty. The report says evidence for existing medicines in PCA specifically is limited, and it does not establish how much people with PCA benefit from Alzheimer’s drugs or which patients may be eligible.
The underlying cause is not the same in every case, and the report does not provide an individual assessment of readers’ symptoms. Vision difficulties can have many causes; the account cannot determine what is causing them in a particular person.
Screening Research and Care
The next step highlighted in the report is validation of Yong’s proposed optometrist screening test across eye and neurology clinics. No completion date or planned rollout is provided. Its findings will be needed before readers can know whether it can help identify PCA earlier in routine care.
For people with a diagnosis, clinicians may consider treatment based on the suspected underlying disease and the person’s circumstances; the report does not describe a cure or a proven PCA-specific drug. It also points to the need for support suited to visual and spatial challenges, including help with movement and daily tasks. Anyone experiencing persistent vision or navigation problems should seek evaluation from a qualified health professional rather than infer a diagnosis from this report.
Key Questions
What is posterior cortical atrophy?
PCA is a syndrome in which damage to brain regions involved in visual and spatial processing can make tasks such as reading, judging distance and navigating difficult. The problem is not necessarily in the eyes themselves.
Does PCA always mean Alzheimer’s disease?
No. The Being Patient report says Alzheimer’s is the underlying cause in about 80% of cases. It also lists dementia with Lewy bodies, prion disease and other neurodegenerative conditions as possible causes.
How is PCA assessed?
The report describes an assessment that may include an eye examination, blood tests, cognitive testing and brain imaging. Additional tests may help identify whether Alzheimer’s is the underlying cause. A qualified clinician determines which evaluations are appropriate.
Is there a cure or established PCA-specific treatment?
The report says there is no cure and that evidence for medicines specifically in PCA is limited. Treatment may depend on the underlying cause and a person’s eligibility; the report does not establish how much Alzheimer’s drugs benefit people with PCA.
Source: rss
