juvenile cataract
Introduction
Introduction Lens opacity is called cataract and occurs in young people called youth cataracts. Aging, genetic, metabolic abnormalities, trauma, radiation, poisoning and local malnutrition can cause damage to the lens capsule, increase its permeability, loss of barrier function, or lead to metabolic disorders of the lens, which can denature the lens protein and form turbidity. The doctor diagnosed by dilated examination. Cataracts are sometimes accompanied by other diseases of the ophthalmology, and may cause other complications, so it must be treated by an ophthalmologist. Once diagnosed as cataract, regular inspections must be made to keep abreast of the progress of cataracts. Since the mechanism of cataract formation is still unknown, so far, no breakthrough has been made in drug therapy. No drug can cure cataracts, or completely prevent or delay the development of cataracts. The most effective way to treat cataracts is surgery, which involves removing cataracts (turbid crystals).
Cause
Cause
(1) Nutrient metabolism: Through animal observation, it was found that certain vitamins and trace elements are associated with cataract formation, such as calcium, phosphorus, vitamin E, A, B2, and the like.
(2) Sunlight and Ultraviolet: For many years, people have noticed that sunlight is involved in the formation of human cataracts. Under the influence of ultraviolet light, phosphorus ions may combine with calcium ions in the aging lens to form insoluble calcium phosphate, which leads to hardening and calcification of the crystal. At the same time, ultraviolet light also affects the redox process of the lens, which causes the lens protein to denature and cause cataract.
(3) The temperature of the outside world.
(4) Hypoxia: In the case of hypoxia, sodium and calcium in the crystal can be increased, potassium and vitamin C are reduced correspondingly, and lactic acid is increased to promote the formation of cataract.
(5) Endocrine: Endocrine disorders can promote the production of cataracts. It is enough to explain that cataracts occur in diabetic patients compared with the average person.
(6) Hardening and dehydration: In the case of dehydration in the human body, the fluid metabolism in the body is disordered, and some abnormal substances are generated, which damage the crystal. Animal experiments have shown that crystals appear empty after hyperosmotic dehydration.
Examine
an examination
Related inspection
Eye and sacral area CT examination pupil appearance eyeball and eyelid ultrasound examination lens examination vision
Bilateral but two eyes can have a history. Vision is progressively declining, and sometimes the fixed black spots can be seen in the bright background. Due to the change of refractive power in different parts of the crystal, there may be multiple visions, and the myopia of monocular double vision increases. The main feature of crystal cortical gray turbidity is that the opacity of the crystal begins from the embryonic nucleus and gradually expands to the adult nucleus. The early yellow color increases with turbidity, the color gradually deepens as deep yellow, and the density of dark brownish yellow nucleus increases. Refractive index Increased, the patient often complained that the reduction of myopia or myopia increased the early peripheral cortex is still transparent, therefore, in the dark, the pupil dilated vision improved and in the strong light pupil diminished vision decreased. Therefore, generally do not wait for the cortex to completely turbid surgery.
Diagnosis
Differential diagnosis
Identification with senile cataract:
Senile cataract is more common in people over 40 years old, and it increases with age. The etiology is related to the degenerative pathological changes of the elderly. It is also considered to be related to long-term exposure to sunlight, endocrine disorders, and metabolic disorders. According to the location of initial opacity, it can be divided into two major categories: nuclear and cortical. Visual impairment is related to the location and density of opacity. The posterior cortex and nuclear opacity affect vision earlier. The treatment is mainly surgery. With contact lenses, intraocular lens implantation can also be performed simultaneously.
