Wearable devices can collect information about your vision, eye movements, environment or everyday activities while you follow your normal routine. Researchers are investigating whether this information could help your clinician monitor your condition, understand your real-world visual function or identify changes requiring further assessment. Some wearable devices can already support you if you have sight loss or allow selected visual tests to be completed at home. Many advanced applications, including biomarker-sensing contact lenses and automated disease predictions, remain experimental and

Eye conditions with the same diagnosis can behave differently and may not respond to treatment in the same way. Precision medicine aims to use information about your genes, eye structure, disease characteristics, general health and previous treatment response to make decisions that are more relevant to you. Some personalised approaches are already used in specialist eye care, particularly when you have an inherited retinal disease or receive treatment requiring repeated imaging. Polygenic risk scores, complex biomarker panels and many artificial

A liquid biopsy analyses biological material found in a fluid such as your blood, tears, aqueous humour or vitreous fluid. Researchers are investigating whether these samples can provide molecular information about your eye condition without requiring a conventional tissue biopsy. The technology is most developed in specialist ocular cancer research and selected investigations for intraocular lymphoma. Most applications cannot currently diagnose your condition, predict your outcome or guide your treatment without your eye examination, imaging and other established tests. What

Blood can contain proteins, antibodies, metabolites and genetic material associated with conditions affecting the eyes. Researchers are investigating whether combinations of these biomarkers could eventually support earlier detection, monitoring and treatment selection. Blood tests already have established roles in selected areas of eye care, including investigating inflammation, infection, thyroid disease and inherited retinal conditions. However, no single blood test can currently diagnose most common retinal, optic-nerve or macular diseases without an eye examination and appropriate imaging. What Is a Blood

A digital twin is a computer-based representation of part or all of the eye. It may combine imaging, clinical measurements and mathematical models to represent ocular structure, function or behaviour. Researchers are investigating whether these models could eventually support disease monitoring, treatment research and surgical planning. However, most ophthalmic applications remain experimental, and many current studies involve virtual or reference models rather than complete digital twins that update continuously for an individual patient. What Is a Digital Twin? A digital

Optical coherence tomography creates detailed cross-sectional images of the retina, optic nerve head and other eye structures. It can measure retinal-layer thickness and identify changes that may not be visible during a standard eye examination. OCT has established roles in diagnosing and monitoring several eye conditions and can support selected neuro-ophthalmic assessments. Researchers are also investigating associations with wider neurological and systemic diseases, but an OCT scan cannot independently diagnose most of these conditions. Why Can Your Retina Reflect General

The retina contains nerve tissue and a visible network of small blood vessels that can be examined without surgery. Changes at the back of the eye may sometimes provide clues about conditions affecting your circulation, nervous system or other organs. A retinal examination cannot provide a complete assessment of your general health or diagnose most systemic diseases. Unexpected findings may instead prompt your eye specialist to recommend medical assessment or further tests. Why Is the Retina Linked to General Health?

Biological changes associated with Alzheimer’s disease may begin years before noticeable memory or thinking difficulties develop. Researchers are investigating whether structural, vascular or biochemical changes in the retina could provide additional clues about these early processes. Studies using OCT, OCT angiography, retinal photography and experimental light-based imaging have reported promising differences between research groups. However, retinal imaging cannot currently diagnose, predict or exclude Alzheimer’s disease and should not replace assessment by a memory specialist. Why Are Researchers Studying the Eyes?

Diabetic retinopathy can develop before you notice changes in your vision. Researchers are investigating whether proteins, inflammatory molecules and genetic material in tears could provide additional information about diabetes-related eye changes. Tear biomarkers are not currently used to diagnose or screen for diabetic retinopathy in routine care. Research remains exploratory, and retinal photography, specialist examination and other established imaging tests are still required. Why Are Researchers Studying Tear Biomarkers? Diabetic retinopathy can begin developing before you notice any changes in

If you have persistent dryness, irritation, watering or fluctuating vision, an eye examination may identify dry eye disease or another ocular-surface condition. However, symptoms alone do not always reveal whether inflammation, allergy, tear-film instability, eyelid problems or another factor is contributing. At Eye Clinic London, point-of-care tear biomarker testing may be used to measure selected markers such as MMP-9, total tear IgE and lymphotoxin-alpha. A tiny tear sample is analysed during the consultation, but the result is interpreted alongside your