What are the clinical manifestations of posterior cataracts?

Posterior cataract is a common ophthalmic disease, which is a condition in which the posterior capsule of the lens retained during surgery is further clouded after cataract surgery, resulting in a further decline in the vision that was originally improved after surgery. When magnified with a slit lamp microscope, the doctor could see that the posterior lens capsule appears white and cloudy, which is caused by the proliferation of lens cells on the surface of the posterior capsule. The main symptom of the patient is that although the visual acuity has improved after cataract surgery, after a few months or years, there is a gradual decrease in visual acuity, which can be accompanied by symptoms such as glare and photophobia.

The main symptom of posterior cataract is decreased vision. Posterior cataract refers to the residual lens cortex or the opacity formed by the proliferation of epithelial cells of the lens after traumatic injury or extracapsular cataract extraction, resulting in decreased transparency and affecting the entry of external light into the eye, resulting in vision loss. The degree to which posterior cataract affects vision depends on the degree and location of the cloudy area, but if the cloudy area is located in the periphery and the degree is mild, the impact on vision is smaller.

The incidence of posterior lens capsular opacity after extracapsular cataract removal can be as high as 50%. Cataract surgery in childhood almost always occurs. The posterior lens capsule appears with uneven thickness of organic tissue and eischnig bead-like bodies.

Often with posterior iris adhesions. The degree of visual acuity affected is related to the degree and thickness of the posterior lens capsule.

After cataract surgery, after the long, cataract, called posterior cataract posterior cataract has many reasons, there are the following points, one, age, moon clearing, nonsense, the more the probability of posterior cataract, because of cell proliferation, faster, especially, children, cataract, basically one hundred percent, occurrence, posterior cataract, two, and the surgeon itself also has a relationship, many doctors in the pupil y, area, dare not go to get the goods to get not clean, but also easy to cause, posterior cataract, three, It is related to the patient's eye itself, and the patient, with iritis, glaucoma, diabetes and other diseases, can also cause cataracts after being found. The most important harm of cataract is to affect vision and cause vision loss, which will affect work and life in the future, for children, cataract can also cause, cause, appliance, functional development disorders such as causing amblyopia strabismus This is more impactful for children, the second, cataract, if it appears, when the expansion period, will cause the attack of acute glaucoma, at this time the patient will have severe eye symptoms, headache, nausea, vision accumulation decline, need emergency treatment, and some, overripe cataract, It can cause, cortical allergic uveitis, manifested by the patient hydrochloric acid, Zheng Yuanhong, which is his effect on function, severe, cataract, and will also affect the observation of fundus diseases. When the cataract is very severe, the fundus cannot be observed, so the observation of fundus disease is relatively large.

The main symptoms of cataract are vision loss, blurred vision, due to the different location and degree of cataract, its impact on vision is also different, if the cataract grows in the periphery of the lens, vision can not be affected, if the cloudiness is located in the lens of the **, the light vision is reduced, the severe vision may only see manual or light sense, in addition, it can also be manifested as myopia deepening, need to change glasses frequently; Monocular diplopia or polyopia, fixed dark shadow or dark vision in front of the eyes, photophobia, etc., and in general, there is no redness and pain in the cataract eye.

The causes of senile cataracts are not well understood. Usual eye care is especially important for the elderly, many elderly eyes are still crystal bright, the lens changes only the density increases, the nucleus hardens, there is no sheet or lumpy opacity, and the vision is also in the normal range.

Early precautions can be taken in the following ways:

Appropriately increase nutrition: eat more vitamin-rich foods such as fruits and vegetables to prevent ultraviolet radiation, wear sunglasses with anti-ultraviolet rays when the sun is strong, and often use some eye medicine or oral drugs that are beneficial to lens metabolism. Patients with diabetes mellitus or other endocrine-metabolic diseases should be treated in a timely manner** and controlled as soon as possible.

Pay attention to eye care: the time for reading, writing, and watching TV should be properly controlled. Go outdoors every 1-2 hours to rest your eyes and don't read in the dark.

If you have refractive errors such as farsightedness, myopia or astigmatism, you should go to the hospital for optometry examination or go to a regular professional optical store to wear suitable glasses to avoid eye fatigue. Do not go to a stall or an informal optical store to buy a pair of glasses and wear them without proper refraction, which will cause damage to your eyes.

Daily life should be regular: control your emotions and temper, have a cheerful personality, and arrange rest and exercise reasonably.

Reasonable diet: In addition to ensuring adequate nutrition for three meals a day, you should eat more foods rich in vitamin C and vitamin E, eat less greasy and salty foods, avoid tobacco and alcohol, and avoid overeating.

However, prevention alone cannot solve the problem, and in the early stage, the vision is slightly blurred, and often it cannot be detected by itself, but the binocular vision (distance vision, near vision) gradually decreases at the same time, and only when the vision is reduced to a certain extent, it is not paid attention to. Middle-aged people should pay attention if they have mild visual impairment, or if they have easy eye fatigue, or if they have black spots in front of their eyes and they are fixed, or if they have clouds in front of their eyes, their vision is blurred, or they have double vision (double vision). However, EuroEyes Ophthalmology has a unique and unrivalled experience in cataracts.

In 1990, Dr. Johansen became the first doctor in Hamburg to perform a revolutionary phacoemulsification procedure. Some patients are able to complete the procedure in 15 minutes** and go home a few minutes later without the need for stitches. More than 100,000 cataract surgeries have now been performed at EuroEyes clinics.

The cataract initially appears radial milky white wedge-shaped opacity in the cortex of the equatorial part of the lens, its base is in the equatorial part, the tip is to the center of the pupil, and the cortex between the turbid stripes is still transparent. sxl

1. Glare: This is one of the early symptoms of cataract, the patient's eyes will lose contrast sensitivity under strong light, and glare will occur under the illumination of car lights at night.

2. Vision loss: This is an early symptom of cataract, no matter what type of cataract, the early symptoms of cataract with vision loss will appear at the initial onset.

3. In daily life, there will be large and small black spots or cord-like shadows in front of the eyes, commonly known as floaters.

4. Refractive changes: This is also an early symptom of cataract, which is mostly manifested as the reduction of presbyopia and the increase of myopia.

5. In the early stage of the disease, the eyes will be distorted due to the swelling of the lens, and monocular diplopia or polyvision will appear, that is, the things seen will overlap.

Symptoms of cataracts:

For cataract disease, the first symptom is the main manifestation of vision loss, early cataract may feel that the vision will be a little blurred, sometimes good, sometimes bad, and even sometimes there will be glare, what we call glare, refers to when we see light, it is not a light but a circle.

In addition, when the cataract develops to a certain extent, it will cause double vision, monocular double vision, and the severity will be a serious loss of vision, and even in the end, everything in front of the eyes is blurry, and you may only see your fingers shaking in front of your eyes to such an extent.

Cataract **:

1. Congenital cataract is related to chromosomal abnormalities or mutations, abnormal lens development in the embryonic stage, viral infection in early pregnancy, and excessive exposure to harmful radiation.

2. Acquired cataract is divided into the following types:

1. Senile cataract is related to many factors, such as degenerative diseases caused by slow metabolism in the elderly, long-term sunlight exposure, endocrine disorders, metabolic disorders, etc.

2. Traumatic cataracts, such as blunt trauma of the eyeball, penetrating injury, radiation injury and intrabulbar foreign body.

3. Concurrent cataract complicated by other eye diseases.

Cataract Surgery** Method:

1. Accoemulsification: It is a new type of cataract surgery carried out at home and abroad in recent years, which has the advantages of small incision, less tissue damage, short operation time and fast vision recovery.

2. Extracapsular cataract extraction: visual function can be restored immediately after surgery, and extracapsular cataract extraction has become a routine surgical method for cataracts.

Blurred vision, or things that could have been seen clearly with glasses become blurred, and things that can be seen clearly at night are even more difficult to see;

Seeing things fade in color, sometimes it is difficult to distinguish colors;

Feeling that the light or sun is more dazzling than before, and that there is an aperture;

Sometimes there is ghosting when looking at things.

a.Decreased vision.

b.Refractive changes: the refractive index of the lens nucleus increases, the refractive force of the lens increases, and nuclear myopia is produced, and the original presbyopia is reduced.

c.Monocular diplopia or polyopia: The lens is cloudy, resulting in an uneven refractive power in all parts of the lensGlare: Caused by clouding of the lens that scatters light entering the eye.

e.Altered color vision: The cloudy lens increases the absorption of light at the blue end of the spectrum, increasing the patient's absorption of light and decreasing the patient's sensitivity to color vision of these lights.

f.Visual field defects: Lens opacity causes cataract patients to have varying degrees of visual field defects.

Clinical manifestations of cataracts, diplopia or halos: the patient will perceive a distortion of the visual object. Sometimes an object is seen as two objects, which is called diplopia.

Or when gazing, a colored aura of color around you is felt and glare is created. Eye strain: Some patients feel that their eyes are easily tired and have eye pain.

Presbyopia "improved": the patient's vision has "improved", but reading books and newspapers does not require reading glasses, leading to the illusion that vision "goes back to old age and childhood". In fact, it is not an improvement in visual acuity, but rather myopia due to the hardening of the lens nucleus that counteracts the farsightedness caused by reading glasses.

A typical clinical manifestation of cataract is that his vision is getting weaker and weaker, and his retina will appear a day shift, becoming more and more blurry, until he slowly can't see clearly, now? What about cataract means? There is no particularly good way to do it except surgery, but there must be certain surgical conditions, including your eyes, and you are completely blind before you can do it later.

What are the specific symptoms of cataracts.

1. Refractive changes.

People with cataracts often feel that their presbyopia is reduced, but their myopia is increasing, or they may need to wear glasses to see things in the distance.

2. Vision loss.

This is the most obvious symptom of developing cataracts. Usually the loss of vision is related to the location and degree of the lens opacity, the patient can feel the continuous decline of vision, the vision is gradually blurred, and in severe cases, only the sense of light remains. Because of the different parts and degrees of opacity of the lens, cataract patients with different degrees will feel that their vision will be defected to varying degrees, and they cannot see everything, which is relatively narrow.

3. Monocular diplopia or imitation polyopia.

This is because the turbidity of the lens makes the refractive power of each part of the lens uneven, and to put it simply, it will produce double vision or polyvision in one eye like a prism, and there will be many images when looking at things.

4. "Presbyopia" improved.

The patient feels that his vision has been "improved", and he does not need to wear reading glasses to read books and newspapers, which produces the illusion of "rejuvenation" of vision. In fact, this is not an improvement in visual acuity, but rather a result of myopia caused by the hardening of the lens nucleus counteracting the farsightedness of reading glasses.

5. There is a fixed black shadow in front of your eyes.

Patients may feel that there is a fixed hazy dark shadow in front of the eyes, which is more obvious in sunlight and light, which is the appearance of the early localized opacity of the lens, but it should be noted that it is different from the clear and progressively enlarged dark shadow phase area caused by retinal detachment.

1. Vision loss.

2, the east of the tomb is seen to be overlapped in the west.

3. The contrast sensitivity decreases at night, and glare occurs under the illumination of car lights at night.

Just at first.

Blurred vision, fear of light, dark or yellow color of objects, etc.

Gradually appear unilateral or bilateral, the onset of the two eyes may be sequential, the vision is progressively reduced, due to the opacity of the lens cortex leads to different refractive power of different parts of the lens, there may be a sense of glare, or monocular diplopia, myopia increases.

What are the precursor symptoms of cataracts, experts: glare, halos, photophobia, are all precursors of cataracts.