Main
- Cataract — clouding of the lens: proteins lose their ordered structure, the image becomes blurred, colours grow dull, and headlights dazzle.
- The main cause is age: also heredity, eye injury, inflammation, diabetes mellitus and prolonged exposure to ultraviolet light.
- Examination by an ophthalmologist: checking visual acuity, measuring intraocular pressure, examination with a slit lamp and of the fundus.
- A sharp drop in vision, severe pain or redness of the eye: seek help the same day, without delay.
- Clouding is removed only by surgery when indicated; in the early stages glasses, lenses and observation by a doctor help.
What is cataract
A cataract is a clouding of the lens, the natural lens inside the eye, which makes vision blurry and dim. Most often it develops gradually in old age, but it can also appear for other reasons.
What happens in the body
The lens of the eye is a transparent, elastic lens that focuses light on the retina and allows you to see clearly. It consists mainly of water and special proteins that are arranged in a strictly ordered way and ensure complete transparency. With age, the structure of these proteins changes, they begin to clump into dense accumulations and lose their original organisation. Because of this, individual areas of the lens become cloudy and stop freely transmitting light rays. A person notices that the image becomes blurred, and colours lose their brightness and seem dim. Gradually, the clouding can cover an increasingly larger area of the lens and noticeably interfere with everyday activities. If your vision makes it difficult to read, work or recognise people, it is worth discussing this with an ophthalmologist.
What causes it to develop
- Old age: the natural ageing of the body gradually changes the structure of the lens proteins, and this is the most common cause of clouding.
- Hereditary predisposition: if close relatives have had this condition, the risk of encountering it is noticeably higher.
- Eye injury: a blow, a bruise or a penetrating injury can disrupt the integrity of the lens and trigger its clouding.
- Inflammatory eye diseases: a prolonged inflammatory process inside the eye can damage the tissues of the lens and accelerate the loss of transparency.
- Diabetes mellitus and other metabolic disorders: when metabolism is disturbed, the composition of the intraocular fluid changes, and this affects the condition of the lens.
- Prolonged exposure to ultraviolet light: constantly being in bright sun without protecting the eyes gradually accumulates damage in the tissues of the lens.
Who encounters this more often
With age, the risk of clouding of the lens increases noticeably, and in elderly people it occurs especially often. In older people, the lens proteins accumulate changes over decades, so the transparency of the lens gradually decreases. Heredity also plays a role: if parents or grandparents have had this condition, the likelihood of repeating their fate is higher. People whose work or life is connected with bright sun are at additional risk because of constant ultraviolet light. Diabetes mellitus and other metabolic disorders also increase the chances of encountering clouding of the lens earlier than usual. Injuries and previous inflammatory eye diseases can shift the timing of the problem's appearance to a younger age. If you fall into one of these groups, it is reasonable to have your vision checked periodically by an ophthalmologist.
What symptoms can there be?
Cataract manifests as a gradual deterioration of vision, which a person often attributes to fatigue or age. Simple attentiveness helps to understand which signs require a routine visit to an ophthalmologist and which require immediate help.
How it is noticed at the very beginning
Cataract develops slowly, and at first it may go unnoticed, because the changes increase imperceptibly for the person themselves. The first warning signal is often blurriness and fog before the eye, because of which letters in a book or on a screen lose their clarity. Many explain this by overwork after a working day and postpone a visit to the doctor for later. Gradually, increased sensitivity to light and glare from the headlights of oncoming cars or bright lamps are added to the fog. In the evening it becomes harder to distinguish faces and navigate in a dimly lit room, although during the day vision seems quite tolerable. Sometimes a person notices shimmering or double vision in one eye, and familiar colours look duller than before. If glasses have to be changed more and more often, and they no longer restore clarity, this is a reason to make an appointment with an ophthalmologist and not wait until vision deteriorates further.
Signs that occur most often
- Blurriness and fog: the image loses clarity, as if you are looking through a fogged-up glass, and this makes it difficult to read and drive.
- Photosensitivity and glare: bright light dazzles more than usual, and headlights and lamps produce interfering streaks and halos.
- Worsening at dusk: in low light, distinguishing objects and faces becomes noticeably harder than during the day.
- Shimmering or double vision: in one eye there is a sensation of a double contour or brief flashes that quickly pass.
- Change in colour perception: shades seem dull and muted, the usual richness of colours around is lost.
- Frequent change of glasses: new glasses help less and less, and visual clarity gradually decreases even in them.
When to seek help urgently
Examinations and tests
Examination for suspected cataract is based on an ophthalmologist's assessment and several simple tests. Below is a breakdown of what exactly the doctor evaluates and what information is useful to bring with you.
How the examination begins
The examination begins with a conversation and a visual acuity test using a chart, because it is reduced clarity of vision that most often brings a person to the doctor. The ophthalmologist then measures intraocular pressure to rule out other causes of vision deterioration. After that, the lens is examined with a slit lamp: the device provides a magnified image and allows opacities to be seen. The doctor also examines the fundus, assessing the condition of the retina and optic nerve. If the lens is clouded to such an extent that it interferes with the examination, an ultrasound scan of the eye is arranged. All these tests are painless and take little time right in the consulting room. The diagnosis is made by the ophthalmologist after the examination and special tests, not on the basis of a single sign.
What is arranged and what it shows
What is worth preparing for the appointment
- Ophthalmologist's reports: bring previous conclusions so that the doctor can see how vision has changed over time.
- Glasses and lenses: bring the ones you use so that your vision can be tested under the usual conditions.
- List of complaints: write down what exactly is troubling you and when it started, so that nothing is forgotten at the appointment.
- Information about other diseases: report chronic illnesses and previous eye surgeries.
- Questions for the doctor: formulate in advance what you want to clarify, and write down the answers for memory.
Which doctor should I see?
If clouding of the lens is suspected, an ophthalmologist is needed. They confirm the condition, assess how much it interferes with vision, and discuss the next steps with you.
Which specialist manages this condition
Clouding of the lens is managed by an ophthalmologist, who sees patients at a polyclinic at the place of residence or at a private ophthalmology centre. At the first appointment, they check visual acuity, examine the eye with a dilated pupil, and assess the density and location of the clouding. There is no separate narrow specialty specifically for this condition, so there is no need to look for a rare specialised doctor. If there is no ophthalmologist nearby, start with a general practitioner: they will assess your general condition and refer you to the right specialist. Some cases are linked to other diseases, so the doctor may suggest a consultation with related specialists. It is worth making an appointment if your vision has decreased to the point that it interferes with reading, working or moving around. Do not put off the visit if bright light or night driving have become noticeably uncomfortable.
What treatment consists of
- Fitting of glasses or contact lenses: in the early stages this helps to correct vision and postpone the decision about surgery.
- Follow-up with an ophthalmologist: regular examinations show how the condition is changing and when indications for intervention appear.
- Surgery when indicated: clouding of the lens can only be radically removed by surgery, when vision interferes with everyday life.
- Management of concomitant diseases: other conditions of the eye and the body affect vision, so they are also kept under control.
- Brighter lighting: a simple household measure makes reading and working indoors easier while vision is moderately reduced.
What depends on the patient themselves
The regularity of follow-up with an ophthalmologist directly affects when the right decision about care will be made. If you come for examinations at the appointed times, the doctor sees the dynamics and notices in time the moment when glasses stop helping. Missed visits lead to a person putting up with the discomfort for years and coming in already with marked vision loss. Write down exactly what has become worse: reading, getting around, recognising faces, working at a computer. These observations help the doctor understand how much the condition interferes with your daily life. Wear the glasses or lenses you have been fitted with constantly, not just occasionally, otherwise the correction loses its point. Tell them about concomitant diseases and about what remedies you take regularly. The practical conclusion is simple: the more precisely you describe your sensations at the appointment, the clearer it is to the doctor what care you personally need.
What helps prevent an exacerbation?
Cataract prevention does not come down to a single action: everyday habits, control of chronic conditions and regular examinations by an ophthalmologist all matter. Below is what exactly depends on the person themselves and how this affects the course of the condition.
What is changed in habits
Protecting the eyes from bright sun is one of the few measures available to a person daily and without special conditions. Wearing a hat with a brim and glasses with a filter reduces the effect of ultraviolet on the lens. Giving up smoking belongs to those changes that affect not only the eyes but also the state of the blood vessels. A balanced diet with plenty of vegetables and fruit supports metabolic processes in the tissues of the eye. Control of diabetes mellitus and blood pressure is important because their fluctuations affect the nourishment of the eye's structures. In diabetes, the glucose level affects the transparency of the lens, and stable readings slow down unfavourable changes. With high blood pressure, small vessels suffer, including those supplying the eye. The practical conclusion is simple: sustained everyday habits give more than one-off efforts, and they are worth establishing for the long term.
What is worth keeping under control
- Glucose level: in diabetes mellitus its fluctuations affect the transparency of the lens, so the readings are important to keep stable.
- Blood pressure: a persistent rise harms the small vessels that supply the structures of the eye, and this affects their function.
- Smoking: giving it up reduces the load on the vessels and tissues of the eye, and also lessens the effect on the general state of the body.
- Being in bright sun: prolonged exposure to ultraviolet without eye protection is considered an unfavourable factor for the lens.
- Diet: plenty of vegetables, fruit and foods with vitamins supports the metabolic processes on which the state of the eye's tissues depends.
- Regular examination by an ophthalmologist: it allows changes to be noticed at an early stage, when the person does not yet feel them themselves.
How often to see the doctor
Regular preventive examinations by an ophthalmologist are needed even when vision seems good and nothing is troubling you. Age-related cataract develops gradually, and the first changes often remain unnoticed by the person themselves. The doctor assesses the state of the lens and other structures of the eye, comparing the results with previous observations. In diabetes mellitus and high blood pressure, control is especially important, since these conditions affect the eye. If new sensations have appeared — blurriness, increased sensitivity to light — the visit should not be put off until the planned date. Regular observation helps to notice changes in time and discuss further steps with the doctor. The practical conclusion: choose a convenient rhythm of visits and stick to it, rather than relying only on how you feel.
What is worth remembering
Cataract develops gradually, and decisions about it are rarely urgent, but they should not be put off for long either. Below is what is useful to keep in mind when it comes to clouding of the lens.
Key takeaways
Cataract is a change in the lens that over time alters a person's vision and daily life. It can be noticed by how the picture dims, how worse one sees at dusk, and how the light of headlights or a lamp begins to dazzle. No single sign on its own definitively indicates cataract, so an assessment is given by a doctor after an examination. Many put off the visit, explaining the changes by age or fatigue, and lose time when helping is still relatively simple. Cataract is not transmitted from person to person and does not appear from reading in poor light. If vision interferes with work, the road or household chores, that is already a reason to discuss the situation with a specialist. It is useful to write down in advance what exactly has changed and when — such details help the conversation with the doctor. The decision on what to do about cataract is made together with the doctor, not on the advice of acquaintances.
