1. Accurate axial measurement can effectively evaluate the risk and progress of myopia. With the prevention and control of myopia becoming a national strategy, the construction of children's refractive development files has been widely promoted nationwide. The axial length is of great significance for myopia diagnosis, refractive development monitoring and prediction, and is an important monitoring parameter of refractive development. Visual optical biometrics will become the new "gold standard" for axial length measurement by observing the OCT image of macular fovea, confirming the fixation state and providing more accurate axial length measurement.
2. Monitor the fundus health and track the fundus changes of high myopia. The White Paper on Myopia Management (2022) proposes that the monitoring indicators of myopia should include environmental or genetic risk factors related to myopia, vision, diopter, axial length and eye health (fundus, intraocular pressure and ocular surface health). With the increase of myopia and the continuous growth of axial length, the probability of retinal choroidal atrophy and characteristic posterior pole and peripheral retinopathy will also increase greatly. Visual optical bio-meter provides OCT images of macular area, which is used to track the structural changes of retina and choroid caused by high myopia and provide important visual indicators for evaluating the progress of myopia.
3. Obtain comprehensive ocular biological parameters to provide more scientific and complete data for cataract surgery. With the popularity of refractive cataract surgery, it is particularly important to measure ocular biological parameters before operation, from the axial length and corneal curvature involved in the second generation formula to the depth of anterior chamber, central corneal thickness, white to white and lens thickness required by the fifth generation formula. Visual optical bionic instrument can obtain the longitudinal scanning information of the whole eyeball through the principle of optical coherence tomography, and provide more scientific and complete data for cataract surgery.
4. Accurate measurement of axial length before cataract surgery can reduce postoperative ametropia. Olsen research believes that the measurement of axial length (al) is very important in the preoperative examination of cataract, and it is the main source of postoperative ametropia. Visual optical biometer can provide accurate axial length data through fixation confirmation, which is of great significance to restore good visual quality after cataract surgery.