Dementia. It is a brain condition that causes loss of cognitive function, which includes thinking, remembering and reasoning. It can also affect a person's ability to perform daily activities. It is a progressive neurological condition, which means the ability to communicate, or to perform cognitively deteriorates with time. You can delay the deterioration, but cannot stop it. But how does one delay the progress without knowing that it is happening? Well now, this can be achieved as Scottish researchers are working on a new AI tool that uses high-street opticians to spot early signs of dementia.

Now, dementia can be diagnosed through an eye test.

AI, Eye Test, And Dementia

Scottish scientists from the NeurEye research team have found that photographs taken of the retina at the back of the eye can indicate of brain health. It is done using AI software to analyze the information. Scientists also use this to spot signs of diseases before any symptoms are even experienced.

The team of scientists has collected a million eye scans from opticians across Scotland, which is also the largest data set of this kind. With the help of AI, they have developed an algorithm that can assess the health of the blood vessels in the eye that indicates neurogenerative diseases.

The database built by the team can be applied to photographs taken during routine eye checkups and could be used by clinicians to prevent diseases from occurring. It could also help them in diagnosing conditions at an earlier stage than what they currently can.

How It Works?

The blood vessels in the eye are small and fine, which means they show up conditions earlier than any other part of our body. Balijean Dhillon, who is part of the research group led by the University of Edinburg and researchers from Glasgow Caledonian University said that eyes can reveal more than was thought possible.

All the systems of the body are represented in eye. In fact, the diseases like cataracts, glaucoma, macular degeneration, problem with vision could also detect vascular system, heart health, high blood pressure, diabetes and even neurological conditions. While some of these conditions may show up late, eye care can detect it way before. The earlier you find it, the better it is for you to be able to delay the deterioration.

What Is Dementia?

Dementia is an umbrella term to describe diseases that cause people to lose their cognitive functions. These diseases gradually progress decreasing the ability for someone to function in daily life and take care of themselves. There are some medications used to delay the onset of it and to manage it. People can reduce the chances of developing it by following a healthy diet and lifestyle.

Types of Dementia

Different types of dementia occur due to different reasons. Some types of this disease are:

Alzheimer’s Disease

Alzheimer’s disease occurs when two abnormal proteins (tau and amyloid protein) build up in the brain. Some of its diseases include mental confusion, short-term memory loss, and personality and behaviour changes. In later stages, people may start having trouble talking, recalling distant memories and have issues with walking.

Vascular Dementia

Vascular dementia may occur because of a stroke or atherosclerosis. Atherosclerosis is the hardening of the arteries from plaque building up gradually inside of them. It blocks and damages blood vessels in the brain. This disease has symptoms such as memory problems, confusion, concentration problems and difficulty in completing tasks.

Mixed Dementia

Mixed dementia is a combination of two or more types of the disease. Sometimes, Alzheimer’s disease combined with vascular dementia causes mixed dementia. The health condition usually declines faster in people with mixed dementia than those who only have one type.

Huntington’s Disease

A mutation in the huntingtin(HTT) gene causes a breakdown in the brain’s nerve cells and it is responsible for Huntington’s. This disease causes body movement control problems, trouble thinking, decision-making, memory trouble and personality changes.

Traumatic Brain Injury

Someone may develop dementia-like symptoms if they suffer from repeated physical trauma to their head. Symptoms may appear after a long time and may include memory loss, behaviour or mood changes, slurred speech and headaches.

Parkinson’s Disease

People who have Parkinson's disease may develop secondary dementia in the later stages. Some of its symptoms are having trouble with thinking or speaking. Patients may have hallucinations and delusions, or suffer from depression.

Normal Pressure Hydrocephalus(NPH)

When Cerebrospinal Fluid(CSF) builds up in the brain’s ventricles the excess build-up harms the brain and this causes Normal Pressure Hydrocephalus(NPH). A brain infection, brain injury, bleeding in the brain or any previous brain surgery can also cause this condition.

This disease has some symptoms such as poor balance, forgetfulness, and short attention span, loss of bladder control, frequent falls and mood swings.

Infections

Some infections such as HIV infection, syphilis as well as Lyme disease can cause dementia-like symptoms. Urinary Tract Infections or UTIs, and lung infections can cause symptoms that match dementia.

Central Nervous infections and brain infections can cause cognitive symptoms. Also, COVID-19 symptoms include acute delirium or brain fog.

Whether it is school, college or work, waking up at a certain hour every day makes your body clock aware that you should be conscious during these hours. However, as time progresses and your obligations change, so can your health. Many jobs these days require night shifts or early mornings, that can throw one’s body clock off.

This mix-up leads to trouble sleeping, feeling super tired during work hours, and general exhaustion. Even people with very early morning commutes can experience this. It's not just being tired; it’s a real problem with your body's sleep rhythm, making it hard to function normally. According to the Cleveland Clinic this is known as Shift Work Sleep Disorder (SWSD) which is a circadian rhythm sleep disorder that causes unwanted sleepiness, being unable to stay awake and other issues.

How Do You Know Whether You Have SWSD?

Shift work disorder does more than just make you sleepy. It's like being constantly tired, even after "sleeping." You might struggle to fall asleep or stay asleep, and you might wake up feeling like you haven't rested at all. Headaches and body aches become frequent, and you might feel irritable or easily annoyed.

Focusing on work becomes difficult, and you might make more mistakes. Your relationships can suffer because you’re always tired and grumpy. You may also feel sad or hopeless, and your memory might get worse. Even your reaction time can slow down, which is dangerous, especially in jobs that require quick thinking. Basically, you never feel truly rested, which affects every part of your life.

How Can You Help SWSD?

If you can’t change your work hours, you can still improve your sleep and feel better. The main goal is to get better sleep quality and duration. If you think you have shift work disorder, you’ll need to talk to a doctor. It’s important to find out if your sleep problems are from your work schedule or something else, like another circadian rhythm disorder. To work towards better, here are some tips according to the Sleep Foundation.

Create a Sleep-Friendly Environment

Make your room super dark and quiet. Use thick curtains and earplugs. A good sleep space helps your body know it's time to rest, even in the daytime.

Maintain a Consistent Sleep Schedule

Go to bed and wake up at the same time every day, even when you're not working. This helps your body get used to a new sleep routine, making it easier to sleep.

Take Naps

Short naps during your breaks can help you stay awake and alert during your shift. Keep naps short, like 20-30 minutes, so you don’t feel groggy later.

Gradual Shift Adjustments

If your schedule changes, slowly move your bedtime and wake-up time by an hour or two each day. This gives your body time to adjust to the new schedule.

Use Dark Glasses

Wear sunglasses when you leave work in the morning. This blocks out sunlight, which tells your body it's still nighttime, helping you fall asleep faster when you get home.

Limit Caffeine

Don't drink coffee or energy drinks close to bedtime. Caffeine keeps you awake. Stop drinking it several hours before you plan to sleep.

Regular Exercise

Being active helps you sleep better. But, avoid working out right before bed. Exercise too close to sleep time can make it harder to fall asleep.

Autism has increased significantly since 2000, particularly in the US, triggering public concern about what might contribute ot its prevalence. In November, Robert F Kennedy Jr, who was selected to lead the US Department of Health and Human Services (HHS), linked autism to childhood vaccinations. Soon, medical experts jumped on it to discredit his claim. But then many raised this question: if autism is not caused by vaccines, then what causes this neurological disorder?

Research tells us that autism tends to run in families, and a meta-analysis of 7 twin studies claims that 60 to 90% of the risk of autism comes from your genome. If you have a child with autism, you are more likely to have another autistic child. Your other family members are also more likely to have a child with ASD.

Changes in certain genes or your genome increase the risk that a child will develop autism. If a parent carries one or more of these gene changes, they may get passed to a child (even if the parent does not have autism). For some people, a high risk for ASD can be associated with a genetic disorder, such as Rett syndrome or fragile X syndrome. For the majority of autism cases, multiple changes in other regions of your DNA increase the risk of autism spectrum disorder. The majority of these DNA changes do not cause autism by themselves but work in conjunction with many other genes and environmental factors to cause autism.

If you or your child has ASD, we recommend that you explore genetic testing. Genetic testing could show you the genetic cause of you or your child’s autism and reveal any genetic mutations that might be linked to serious co-occurring conditions like epilepsy. Genetic testing can give doctors useful information so they can provide better, more personalized interventions. Read two families' stories on how genomics helped their understanding of autism and receiving personalized healthcare.

What environmental factors are associated with autism?

According to the National Institute of Environmental Health Sciences, certain environmental influences may increase autism risk:

• Advanced parental age
• Prenatal exposure to air pollution or certain pesticides
• Maternal obesity, diabetes or immune system disorders
• Extreme prematurity or very low birth weight
• Birth complications leading to periods of oxygen deprivation to the baby’s brain

After growing concerns about the effects of short-form videos on mental health, doctors are now warning of a new and escalating crisis—‘reel-induced eye damage.’ Excessive screen time, particularly binge-watching reels on social media platforms such as Instagram, TikTok, Facebook, and YouTube, is leading to a surge in eye disorders across all age groups, with children and young adults being the most affected.

This issue was highlighted by leading ophthalmologists during the ongoing Joint Meeting of the Asia Pacific Academy of Ophthalmology and All India Ophthalmological Society at the Yashobhoomi-India International Convention and Expo Centre on Tuesday.

Asia Pacific Academy of Ophthalmology (APAO) 2025 Congress president Dr Lalit Verma raised serious concerns about the ‘silent epidemic of digital eye strain’ triggered by excessive screen exposure. “We are witnessing a sharp rise in cases of dry eye syndrome, myopia progression, eye strain, and even early-onset squinting, especially in children who spend hours watching reels,” he stated.

“A student recently visited us with complaints of persistent eye irritation and blurry vision. Upon examination, we found that his eyes were not producing enough tears due to prolonged screen time at home watching reels. He was immediately prescribed eye drops and advised to follow the 20-20-20 rule—taking a 20-second break every 20 minutes to look at something 20 feet away,” Dr Verma added.

Reels Capture Your Attention For A Lot Of Time

Dr Harbansh Lal, chairman of the Organising Committee and president of the All India Ophthalmological Society, elaborated on the severity of the issue. He explained that short, engaging reels are designed to capture and retain attention for extended periods.

“However, constant screen fixation reduces blink rates by 50%, leading to dry eye syndrome and accommodation spasms, which make it difficult to shift focus between near and distant objects. Experts warn that if this habit remains unchecked, it could lead to long-term vision problems and even permanent eye strain,” he cautioned.

Dr Lal further emphasized that children who spend hours daily glued to reels are at an increased risk of developing early-onset myopia, which is progressing faster than ever before. Adults, too, are experiencing frequent headaches, migraines, and sleep disorders caused by blue light.

Recent studies indicate that by 2050, over 50% of the world’s population will be myopic, making it the leading cause of irreversible blindness. The increasing screen time has also led to fluctuating lens prescriptions until the age of 30, a shift from the previous norm of 21, Dr. Lal noted.

Research shows a growing number of people, particularly students and working professionals, are struggling with digital eye strain, squinting, and worsening eyesight due to prolonged exposure to high-speed, visually stimulating content. Doctors are also observing a concerning trend of social isolation, mental fatigue, and cognitive overload linked to constant reel consumption.

Dr Samar Basak, president of AIOS and a senior ophthalmologist, highlighted the social and psychological toll of excessive screen time. “We are noticing a pattern where people become so engrossed in reels that they neglect real-world interactions, leading to strained family relationships and a decline in focus on education and work.”

Dr Partha Biswas, senior ophthalmologist and incoming president of AIOS, warned, “The combination of artificial lighting, rapid visual changes, and prolonged near-focus activity overstimulates the eyes, leading to a condition we call ‘Reel Vision Syndrome.’ It’s crucial to address this before it escalates into a full-scale public health crisis.”

To mitigate the harmful effects of excessive reel-watching, ophthalmologists recommend adopting the 20-20-20 rule, increasing blink rates, consciously making an effort to blink more frequently while using screens, reducing screen time, and taking digital detoxes through regular breaks.

With eye disorders on the rise due to unregulated reel consumption, health experts urge parents, educators, and social media users to take immediate preventive measures. “Reels may be short, but their impact on eye health can last a lifetime,” warned Dr. Lal.