Due to the widespread use of electronic products, environmental impact and many other reasons, the number of patients with dry eye syndrome has been increasing and younger in recent years, and dry eye has an important impact on the accuracy of preoperative examination, postoperative recovery and visual quality of patients after myopia surgery.
Effect of dry eye on preoperative examination of myopia surgery
Dry eye may lead to ocular surface irregularities, which can affect the results of relevant examinations before corneal refractive surgery, such as corneal curvature, corneal topography, and wavefront aberration, which are directly related to the design of the surgical plan. Professor Zhou Yuehua mentioned that the homeostasis of the tear film on the ocular surface of dry eye patients is unbalanced, and the smoothness of the cornea decreases, which in turn affects the accuracy of the corneal morphology examination results.
In addition, dry eye causes corneal epithelial roughness, which leads to errors in corneal thickness measurement, which affects the safety and effectiveness of surgery. Corneal thickness is an important surgical indicator for myopia surgery, and the accuracy of corneal thickness measurement is crucial to surgical safety.
Effect of dry eye on postoperative outcomes of myopia surgery
Postoperative dry eye is not conducive to wound healing and early vision recovery, and even affects the final surgical effect. Professor Zhou said that various laser myopia surgeries will cut off the nerves in the corneal stroma, and if the patient is accompanied by meibomian gland dysfunction, it will cause poor stability of the tear film, which will affect the curvature of the anterior surface of the cornea, and the unstable tear film will have a certain impact on the lubrication of the surface and light transmission. Abnormal tear quality can cause dehydration and edema of epithelial cells, affecting ocular surface homeostasis.
Experts said that some patients with meibomian gland dysfunction before surgery are overaccommodating the eyeball after surgery due to unstable tear film, and there is a deviation in clinical refractionThere are also some patients with meibomian gland dysfunction who do not have strong eye autoregulation, but in the case of a relatively dry cornea, it will cause hyperopia drift in the refractive state after surgery.
In addition, dry eye may also cause symptoms such as dry and painful eyes after surgery, reducing the quality of life and satisfaction of postoperative patients.
Hangzhou Mingshijia Ophthalmology Reminder:For patients with dry eye, professional ophthalmic medical institutions should follow the principle of personalized and precise diagnosis and treatment, and will evaluate and intervene in all details of refractive surgery before, during and after surgery to help patients achieve good postoperative visual quality.