Abstract: corneal thickness plays a decisive role in the selection of surgery and the design of cutting amount. The measurement of corneal thickness will enable the operation to obtain more accurate prediction results.
myopia correction is not suitable for everyone with myopia problems. Preoperative examination can effectively screen myopia patients and effectively investigate surgical contraindications, such as dry eye, keratoconus, thin cornea and other fundus diseases. Only through strict deep eye examination and each data meets the conditions of operation, can myopia patients carry out laser myopia correction, which is also an important step to ensure the safety of myopia patients.
is very important for a perfect laser correction surgery. A set of standard, standardized and systematic preoperative examination is very important. It can not only help doctors design the most suitable surgical scheme for individuals and lay the foundation for good postoperative results, but also find out whether you are really suitable for laser correction surgery and ensure good postoperative vision.
preoperative examination items
visual acuity examination
naked visual acuity and corrected visual acuity.
diopter is correct or not directly affects the surgical effect. Generally, computer optometry, retinoscopy optometry and subjective optometry are combined to accurately calculate the diopter. At the same time, the most appropriate diopter to be corrected was determined by comprehensively considering the patient’s occupation, age, corneal thickness and other factors.
intraocular pressure check
to rule out the possibility of high intraocular pressure and glaucoma. Monitor the changes of intraocular pressure before and after operation to prevent eye damage caused by postoperative hormonal high intraocular pressure.
corneal topography examination
can intuitively express the anterior surface morphology of the whole cornea, understand its regularity and symmetry, exclude the possibility of keratoconus, and monitor the changes of corneal morphology after operation.
anterior segment examination
measurement of pupil diameter, including cornea, conjunctiva, anterior chamber, lens and anterior vitreous segment.
fundus examination before
operation, the fundus must be carefully examined for mydriasis to exclude fundus diseases such as retinal hole, detachment, degeneration and bleeding.
corneal thickness measurement of
corneal thickness plays a decisive role in the selection of surgery and the design of cutting amount. The measurement of corneal thickness will enable the operation to obtain more accurate prediction results.
wavefront aberration inspection
detects the overall aberrations of human eyes, including low-order aberrations such as myopia, hyperopia and astigmatism, and high-order aberrations that cannot be corrected with glasses. The personalized cutting scheme is determined according to different individuals.