What are the tests for cataracts and what do you need to check for cataracts?

Cataract examination: visual acuity examination, electroretinography, evoked potential examination, intraocular pressure examination, fundus examination, retinal potential mapping, evoked potential (VEP) examination.

Cataract tests include visual acuity, slit lamp examination, dilated pupil examination, fundus examination, and intraocular pressure.

First, first of all, the first thing to do is to check your vision, if you have cataracts, but your vision can still be maintained, then you don't have to worry, and you don't need surgery right away.

Second, it is necessary to check the condition of the crystal under the slit lamp, such as the degree of crystal turbidity, turbidity parts, etc.

Third, a dilated pupil examination is needed to better determine the morphology of the lens, the location of the cataract, the presence of problems in the suspensory ligament of the lens, and the presence of iris problems.

Fourth, check whether there is opacity, retinal condition and macular condition of the fundus vitreous body, which can determine the effect that can be achieved by surgery and have a certain judgment on the prognosis.

Fifth, measure the intraocular pressure to see if the cataract is combined with glaucoma.

1.Fundus examination: used to check the size, shape, and color of fundus lesions and cataracts;

2.Vitroscopy: used to check the transparency and structure of the vitreous;

3.Visual acuity test: used to assess changes in visual acuity;

4.Intraocular pressure test: used to check if intraocular pressure is elevated;

5.Ultrasound: used to examine structures in the eye, it can detect the size and shape of cataracts;

6.Fundus fluorescence test: used to check the condition of the blood vessels in the fundus;

7.Computerized test: used to check the visual sensitivity of the eye;

8.Eye scan: Used to check the structure of the eye and the condition of the internal organs.

(1) Visual acuity and intraocular pressure tests are performed.

2) Irrigation of the tear duct, which can help rule out occlusion of the lacrimal duct and dacryocystitis.

3) Slit lamp examination of the anterior segment of the eye: conjunctiva, cornea, anterior chamber, iris, pupil, lens opacity, etc.

4) Ophthalmoscopy or fundus photography to rule out fundus lesions.

1 Visual function test: light perception, light positioning, color vision, near and far daily life vision (vision in the state of daily refractive correction) and corrected visual acuity.

2 Measurement of intraocular pressure: The intraocular pressure of the operated eye should be within the normal range. If glaucoma is also present, it should be considered as a complex case.

3 External eye examination: Flashlight and magnifying glass, or under a slit lamp microscope, should be used to exclude infectious lesions and active inflammation in the eye and adjacent parts.

4 Corneal examination: Examination with a slit-lamp microscope. A keratometer should be used to check the corneal curvature. For patients who have had internal eye surgery, corneal degeneration, or are too old, corneal endothelial microscopy should be performed if possible.

5. Lens examination: Slit lamp microscope should be used to understand the degree and location of lens opacity, and judge whether it is consistent with the degree of visual impairment. If necessary, the examination should be done after dilating the pupils.

6 Know as much as possible about the posterior segment of the eye so as to rule out eye diseases that affect the recovery of visual function after surgery. If macular degeneration or optic neuropathy is suspected, the prognosis of cataract surgery is poor, and it should be explained to the patient or his family before the operation, and recorded in the medical record as required.

7 Axial length was measured using an ophthalmic A-type ultrasound scanner. A B-mode ultrasound scanner is used to understand the inside of the eye.

8 Measure the diopter of the intraocular lens to be implanted.

Preoperative examination of cataract includes visual acuity examination, intraocular pressure examination, corneal examination, corneal topography examination and corneal curvature examination. At the same time, the condition of the lens, the patency of the tear duct, and the length of the eye axis should be measured. The most important thing is to check the condition of the fundus, if there is a disease in the fundus, cataract surgery is not recommended.

The preoperative examination of cataract is mainly divided into the following parts: 1. Eye examination, such as corneal endothelial examination, ocular biometry, retinal OCT examination, etc., for the purpose of selecting the appropriate intraocular lens and evaluating the prognosis and risk of surgery; 2. General examination, including blood pressure, blood glucose, electrocardiogram, blood routine, liver and kidney function, etc.

Laboratory tests for hematuria, electrocardiogram and, now, chest x-ray are usually required. In the area of the eye, fundus examination is mainly done.

Introduction: People's physical health is very much affected by work and living conditions, when you get older, there will be a variety of diseases, among which cataract is a very common one, what are the symptoms of cataract? How can I tell if it's a cataract?

When a cataract occurs, there will be a noticeable change in the eyeball, which is made up of the whites of the eyes and the pupils of the eyes. The pupil is generally black, and when a cataract first appears, you will find that there will be a white spot in the middle of the pupil, and this white spot will gradually expand, which looks like a change similar to white, and such a situation is a cataract. In addition, after the appearance of cataracts, you will feel blurred vision, you will not be able to see anything clearly, and if you do not do it at the right time**, you may become blind permanently.

The appearance of cataract is mainly due to the aging of the lens of oneself, and the aging process will cause the aging of the cataract lens. It is caused by age and one's usual eye habits, because the eyes will age as people get older. If you have cataracts, you need timely treatment, and you can replace the intraocular lens to alleviate your cataract symptoms, restore your vision, and make your eyes look better.

If we have good eye habits in daily life, then it is not easy to be myopia, and the eyes are not easy to have problems, once myopia, it is difficult to take off the glasses, which will cause a lot of inconvenience to their daily life. Another thing is to reduce the time you spend with your eyes, and staring at the screen for a long time will also cause dry eyes, and it will squeeze the lens, resulting in permanent myopia. After you have a good habit of using your eyes, then you can see the world more clearly.

Symptoms of cataracts include blurred vision and decreased vision; Contrast sensitivity decreased significantly; refractive changes; monocular diplopia or polyopia; Changes in color vision, visual field defects, etc.

Go to a professional eye hospital for examination, generally these people's vision loss is particularly serious, myopia will be aggravated, presbyopia will be reduced, and vision will be seriously impaired.

Eye exam. In general, vision loss is particularly severe, myopia is worsened, presbyopia is reduced, and vision is severely impaired.

To be accurate, it is best to go to a regular and powerful hospital for examination.

The following are excerpts from the Internet for the early symptoms of cataracts, which you can refer to

Most people think that cataract is only a senile eye disease, but in fact, it often occurs in middle age, that is, after the age of 45, and the initial symptoms of cataract are mainly visual impairment. In the early stage, the vision is slightly dim, and it is often not noticeable by itself, but the binocular vision (distance vision, near vision) gradually decreases at the same time, and it is only when the vision is reduced to a certain extent that it is not noticed. 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).

In addition, some people wear reading glasses for a long time, and occasionally they can see near objects clearly when they do not wear reading glasses, which is also an early sign of cataracts. Other early signs of cataract include opacity of the crystal, decreased sense of sensation when looking at objects, poor color vision when looking at colors, deterioration of dark adaptability, and prolonged time to see objects clearly.

According to clinical investigations, the high incidence of cataracts is people who are sensitive to sunlight. In other words, the signs of changes that occur on the sun can detect the suspicious constitution of cataract at an early stage. In the summer, some people will have red spots or small blisters on the sun after being exposed to the sun, and these people's ** is generally whiter and sensitive to ultraviolet rays, so they are prone to sunburn.

Ophthalmologists have found that among these people who are prone to sunburn, some people will produce oxygen free radicals after being exposed to the sun, which can cause damage.

If these people are exposed to too much sunlight, they will also produce oxygen free radicals locally, resulting in disorders of eye lens metabolism, and the crystal transparency will gradually decline, resulting in lens cloudiness and cataracts. In such people who are sensitive to sun exposure, the incidence of cataracts can be 30% to 40% higher than that of the general population, and the age of onset can be 5 to 10 years earlier.

Premature and excessive tooth loss in older people is also associated with the onset of cataracts. Although the causal relationship between the two has not yet been clarified, at least the premature loss of a tooth is a yellow card warning that cataracts are about to occur. Tooth loss in the elderly is one of the phenomena of aging and is inevitable.

Normal loss is not related to the occurrence of cataracts, the key problem is that the loss is too early and excessive, and the tooth loss is several or more times than that of people of the same age, which should be alert to the possibility of cataracts.

Diagnosis of cataract requires a detailed examination of the eye, slit lamp, intraocular pressure, and dilated eye area with topical eye medicine.

Before cataract surgery, visual function (light vision, light positioning, color vision) examination, fundus examination, ocular electrophysiology examination, ocular ultrasound examination, macular function examination, corneal endothelial cell count measurement, etc. are also required.

The incidence of these diseases increases with age, and they are all physiological phenomena.

The clinical symptoms of cataract are not typical, and they are easily confused with other eye diseases, such as refractive error, myopia, farsightedness, astigmatism, blurred vision, glare and other symptoms. Among them, fundus vein occlusion, manifested as ** blurred vision and decreased vision, should be actively identified. A comprehensive eye examination, such as visual acuity, intraocular pressure, slit-lamp examination, visual lens opacity, and severity, matching the degree of vision loss, and other ophthalmic diseases, are performed.

Common symptoms: blurred vision, whitening of the pupils, cystoid macular edema, decreased or absent ocular accommodation.

1.Blurred vision: cataract is mainly caused by opacity of the lens, and patients first present with blurred vision, which can be mild or severe due to the location of the opacity of the lens. Congenital cataracts are mainly manifested by poor vision that cannot be corrected.

2.Shadows: At first, you stumble upon a fixed shadow in front of you that cannot be erased. As blurred vision worsens, dark shadows are not noticeable, but visual acuity is markedly reduced.

3.Myopia: The patient notices that the original reading glasses have become lighter or that they no longer need to wear reading glasses. This is due to crystalline myopia due to the hardening of the crystal nucleus.

4.Monocular polyopia: caused by irregular astigmatism of the lens. Especially when the pupils are relatively dilated in a dark place, such as when looking at the street lamp and the moon at night, it is easy to find.

5.Poor outdoor sunlight and relatively dark indoor vision: seen in nuclear cataracts. Due to the narrowing of the pupils in bright light, the vision is obscured.

1. Blurred vision: cataract is caused by the opacity of the lens, and the patient first presents with blurred vision, which can be mild or severe according to the location of the opacity of the lens.

2. Shadow: At first, I accidentally found that there was a fixed shadow in front of my eyes, which could not be erased. As blurred vision worsens, dark shadows are not noticeable, but visual acuity is markedly reduced.

3. Myopia: The patient finds that the original reading glasses have become shallower or no longer need to wear reading glasses. This is due to crystalline myopia due to the hardening of the crystal nucleus.

4. Monocular diplopia: caused by irregular astigmatism of the lens. Especially when the pupils are relatively dilated in dark places, such as looking at street lights at night, it is easy to find.

5. Poor vision in sunlight: nuclear cataract has narrowed pupils and blocked vision under strong light, which is better indoors and in dark places.

The main symptoms are as follows:

The visual force is deepened.

Floaters are day or night blindness.

The eyes are red, sore, and painful.

Typical symptoms are ** blurred vision, decreased visual acuity, long duration of symptoms, and may be accompanied by other visual dysfunction. Depending on the type, the symptoms are different, cortical cataracts: veil-like sensation may occur; Nuclear cataract:

As the core lens increases the degree of myopia, it is manifested as clear near vision and blurred vision, which eventually leads to decreased vision; optic opportacity: poor vision during the day and better vision at night; Irregular cloudiness of crystals: Appears as a nighttime glare.

Hello, cataracts are caused by clouding of the lens, and its main symptom is to cause vision loss. In the early stage of cataract, the vision of patients will not change much, the quality of vision will be reduced, and the vision will be like a layer of fog, and the blurred vision will not be real. As the lens becomes more cloudy, the patient's vision begins to gradually deteriorate.

As cataracts progress, patients also experience symptoms of decreased contrast sensitivity, decreased color vision, and decreased visual resolution. Cataracts mainly affect the loss of vision.