Yes, changes in vision and the eye itself can be early indicators of dementia, as the brain's processing of visual information is affected, and subtle changes in retinal blood vessels and nerve tissue can appear before memory symptoms, with issues like difficulty with contrast, depth perception, or tracking objects sometimes signaling cognitive decline.
Changes in the eyes are often overlooked but can be a significant indicator of underlying neurological conditions like dementia and Alzheimer's. These changes, though subtle, can manifest in various ways, from pupil size and reactivity to overall gaze and eye movement patterns.
Early-Onset Dementia Symptoms
Physicians use diagnostic tools combined with medical history and other information, including neurological exams, cognitive and functional assessments, brain imaging (MRI, CT, PET) and cerebrospinal fluid or blood tests to make an accurate diagnosis.
Problems with vision that someone with PCA may experience include distortions, sensitivity to light, seeing unusual colours, and visual hallucinations. Some other symptoms could be difficulty spelling, identifying objects, recognising faces, and understanding numbers.
The "2-finger test" for dementia involves an examiner showing a hand gesture (like interlocking index and middle fingers) and asking the patient to copy it, testing motor skills, visual memory, and coordination, as difficulties can signal early cognitive decline, but it's a screening tool, not a definitive diagnosis, prompting further medical evaluation. Other related tests include finger-tapping and finger-to-nose, looking for hesitation or misjudgment in movement.
Symptoms
Common changes in behaviour
Although the early signs vary, common early symptoms of dementia include: memory problems, particularly remembering recent events. increasing confusion.
In stage 1 of the Global Deterioration Scale, or GDS, the person isn't experiencing any symptoms. There's no cognitive decline, and although they may have occasional memory lapses, forgetfulness has no impact on their function.
There is no known cure, but early diagnosis and treatment can lead to better quality of life. Stay healthy with a good diet and regular exercise. Stay away from alcohol and other substances that may affect memory, thinking, and behavior.
Routine eye tests may be able to predict a person's risk of dementia thanks to a digital tool developed by data scientists and clinical researchers in partnership with high street opticians.
Diabetic retinopathy is the No. 1 cause of vision loss in working-age adults in the U.S. Autoimmune diseases Droopy eyelids or inflammation of the eye or optic nerve (connects to your brain) could be a sign of multiple sclerosis, myasthenia gravis, Crohn's disease, sarcoidosis or Behcet's disease.
A new study suggests that personality traits like neuroticism and conscientiousness may increase dementia risk. Psychological factors appear to affect dementia likelihood though not underlying brain neuropathology. Protective traits, particularly conscientiousness, seem to grow stronger with age against dementia.
Breaking the habit of sedentary behavior is a powerful step toward reducing dementia risk. Pairing this with other lifestyle modifications—such as exercise, a healthy diet, quality sleep, and social engagement—creates a comprehensive approach to brain health.
The number one cause of dementia is Alzheimer's disease, responsible for 60-80% of cases, characterized by brain plaques (beta-amyloid protein) and tangles (tau protein) that damage nerve cells, leading to progressive memory and cognitive decline, though vascular dementia from blood vessel damage is also a significant factor.
It's often termed "mild cognitive impairment" (MCI) as the symptoms are not severe enough to be diagnosed as dementia. You might not notice these symptoms if you have them, and family and friends may not notice or take them seriously for some time. In some people, these symptoms will remain the same and not worsen.
For most people with Alzheimer's — those who have the late-onset variety — symptoms first appear in their mid-60s or later. When the disease develops before age 65, it's considered early-onset Alzheimer's, which can begin as early as a person's 30s, although this is rare.
Our results confirm that vitamin D deficiency is associated with a substantially increased risk of all-cause dementia and Alzheimer disease.
The SAGE test is a short, self-administered evaluation that screens for early signs of memory or thinking problems like dementia. You take it on your own, at home or at your provider's office. It's simple and there's no studying needed. It can catch issues early.
Age. The biggest risk factor for dementia is ageing. This means as a person gets older, their risk of developing dementia increases a lot. For people aged between 65 and 69, around 2 in every 100 people have dementia.
People with symptoms of dementia are given tests to check their mental abilities, such as memory or thinking. These tests are known as cognitive assessments, and may be done initially by a GP. There are several different tests. A common one used by GPs is the General Practitioner Assessment of Cognition (GPCOG).