Mid term symptoms of cataract?

summary

All kinds of reasons, such as aging, genetic, local nutritional disorders, immune and metabolic abnormalities, trauma, poisoning, radiation, etc., can cause lens metabolic disorders, leading to lens protein degeneration and turbidity, which is called cataract. At this time, light is blocked by the turbid lens and cannot be projected on the retina, resulting in blurred vision. It is more common in people over 40 years of age, and the incidence rate increases with age. Mid term symptoms of cataract? Let's talk about it

Mid term symptoms of cataract?

Because of cortical opacity, the refractive power of different parts of the lens is different, there may be a sense of glare, or monocular diplopia, and the degree of myopia increases. Clinically, senile cataract can be divided into cortical, nuclear and subcapsular types.

The opacity of lens began to increase in density from the center of the lens, i.e. the nucleus of embryo, and gradually aggravated and slowly extended to the periphery. In the early stage, it was light yellow. With the aggravation of the opacity, the color gradually deepened, such as dark yellow and dark brown yellow. The density of nucleus increased and the refractive index increased,

Patients often complain of reduced presbyopia or increased myopia, early peripheral cortex is still transparent, therefore, in the dark pupil dilation, visual acuity improved, but in the strong light pupil narrowing, visual acuity decreased, so generally do not wait for the cortex completely turbid immediately surgery.

matters needing attention

The incision of extracapsular cataract extraction is smaller than that of intracapsular cataract extraction. The posterior capsule was preserved and the posterior chamber intraocular lens could be implanted at the same time. Therefore, extracapsular cataract extraction (ECCE) has become a routine method of cataract surgery.