lens examination

Lens examination of the lens with a slit lamp microscope is one of the important methods to determine the presence or absence of cataract. However, due to the complex structure of the lens itself, the normal condition of the lens under the slit lamp should be thoroughly understood before misdiagnosis. Through the slit lamp narrow light, direct focus positioning, from the front to the back, the optical section of the adult transparent lens, the following bands appear: anterior capsule, anterior cortex, anterior adult nucleus, pre-baby nucleus, pre-fetal nucleus, Anterior and posterior embryo nuclei, posterior fetal nuclei, posterior infant nuclei, posterior adult nuclei, posterior cortex and posterior caps. Basic Information Specialist Category: Ophthalmic Examination Category: Other Inspections Applicable gender: whether men and women apply fasting: not fasting Tips: Inappropriate people: healthy eyes. Normal value On the surface of the anterior lens of the lens, there is often brown-yellow stellate cell deposition, which is a pigment cell with several protrusions. Sometimes it is single, and sometimes it is a majority. Due to the use of slit lamps, many normal people have found this change. Clinical significance Abnormal results The baby's nucleus is formed from prenatal to adolescent, and the examination is often not obvious; the adult nucleus is formed from puberty to adulthood (35 years old) and gradually develops later. From the optical cut surface, the adult nuclear surface is not very smooth, and sometimes the surface has vacuoles and undulations. Need to check the population with cataracts or the elderly. Precautions Taboo before the test: eat spicy food. Requirements for inspection: Do not use too much light band. Inspection process Through the slit lamp narrow light, direct focus positioning, from the front to the back, the optical section of the adult transparent lens, the following bands appear: anterior capsule, anterior cortex, anterior adult nucleus, pre-baby nucleus, pre-fetal nucleus, Anterior and posterior embryo nuclei, posterior fetal nuclei, posterior infant nuclei, posterior adult nuclei, posterior cortex and posterior caps. All layers of light bands may not be visible in a crystalline body due to age, but the anterior and posterior bands of adult nuclear and baby nuclei are generally visible. Not suitable for the crowd Inappropriate crowd: healthy eyes.