What tests are needed before getting contact lenses

What tests are needed before getting contact lenses

Contact lenses are lenses that are worn on the cornea of the eye to correct vision and protect the eye. It belongs to the national class III medical devices. If you don't check the contact lenses for the first time, it is likely to affect the comfort of wearing them according to the conversion of your frame power, so you should do a series of examinations before wearing contact lenses. What tests do I need to do before getting contact lenses? 1) Measurement of near and far visual acuity; Optometry to check the refraction of the eye, according to the optometry, check the refractive conversion table, determine the refractive power of the contact lens 2) rule out other causes of visual loss; 3) Optometry to check the diopter of both eyes; 4) measure the volume of tears; Check whether the physiological structure and morphology of the cornea and conjunctiva of the eye are normal. 5) Measure the radius of corneal curvature; So as to find the right lens base arc for yourself. Measure the relevant parameters of the eye. In this way, you can determine whether the wearer is suitable for contact lenses and better choose the right type of contact lens for you. 6) Convert and determine the power of contact lenses according to the optometry sheet; 7) Choose the right lens and check the comfort; 8) Check the mobility of the lenses after wearing the glasses to ensure that they are worn healthily. The wearer should have a doctor or optometrist for a follow-up examination one week, one month, three months after wearing the glasses, and every six months thereafter. Small