What are the tests to be done for myopia surgery?
Myopia surgery itself is not complicated, but its success is very much related to surgical equipment, physician experience, pre-operative examination, surgical environment, and post-operative maintenance. In particular, the pre-operative examinations determine the final judgment of the surgeon and are directly related to the design of the surgical plan and the safety of the surgery. So, what examinations should be done for myopia surgery?
Director Wei introduced the following tests that must be done before myopia surgery.
1, corneal thickness measurement: corneal thickness has a decisive role in the selection of surgery and the design of the size of the cut. The measurement of corneal thickness will enable the surgery to obtain more accurate prediction results.
2, wavefront aberration check: detect the overall aberration of the human eye, including myopia, hyperopia, astigmatism and other low-order aberrations and higher-order aberrations that cannot be corrected with glasses, and determine the personalized surgical plan according to different individuals.
3.Visual acuity check: bare eye vision and corrected visual acuity.
4.Ocular segment examination: measurement of pupil diameter, including cornea, conjunctiva, anterior chamber, crystal, and anterior vitreous segment.
5.Fundus examination: The fundus must be carefully examined before surgery to exclude retinal fissures, detachment, degeneration, hemorrhage and other fundus diseases.
6, corneal topography examination: it can visually express the entire corneal anterior surface morphology, understand its regularity and symmetry, exclude the possibility of cone corneal, and monitor the change of corneal morphology after surgery.
Special reminder: If patients have certain eye diseases or systemic diseases, they cannot undergo similar excimer laser surgery, which are clinically called contraindications. These include cone cornea, glaucoma, rabbit eye, severe dry eye and active inflammation of the eye; severe amblyopia with very poor corrected visual acuity; systemic diseases that affect wound healing, such as diabetes, autoimmune diseases, etc.; and mental and psychological abnormalities. Thus, to ensure the safety of surgery, myopic patients must choose a regular professional eye hospital for surgery and do a strict pre-operative examination.
In order to guarantee a safer and more effective surgery, Tianjin Medical University Eye Hospital has carefully customized more than ten rigorous preoperative examinations for each refractive surgery patient to ensure safe and effective surgery and to exclude postoperative complications.
Pre-operative examination items
1.Naked eye visual acuity
2.Lens vision
3.IOP check
4.Computerized optometry
5.Obvious optometry
6.Dilated pupil optometry
7.Corneal topography
8.Corneal thickness measurement
9.External eye examination
10.Slit lamp examination
11.Ocular A ultrasound
12.Tear film rupture time measurement
13.Tear secretion test
14.Wavefront aberration
15.Fundus check after dilated pupil
16.Ocular axis measurement
17.Individualized surgical design.
Precautions for preoperative examination
1.The comprehensive examination before surgery is very important. Be sure to go to the hospital for a comprehensive examination, including corneal topography, corneal thickness measurement, optometry, fundus and other examinations.
2, the examination will take about 2-3 hours, so allow enough time. The hospital closes at 5 pm, so it is best to arrive at 1:30 pm when you go to work.
3, fundus examination and optometry require dilated pupils, so when you go to the hospital for examination, you must not drive or ride a bike alone.
4, corneal topography and corneal thickness tests need to exclude the influence of contact lenses, so you must remove your contact lenses before the examination. It is best to go to the hospital for examination after 1 week of lens removal.