What causes blurred vision half a month after semi-Femtosecond surgery, and what should be done?
Jan 06, 2023
Source: Cainiu Health
Dr. Wang Shuai
Introduction
Generally, if blurred vision occurs half a month after a semi-Femtosecond laser surgery, it is recommended to seek medical attention promptly for early evaluation and diagnosis. After semi-Femtosecond laser surgery, patients should undergo regular follow-up examinations, typically scheduled on the 2nd day, 1 week, 1 month, 3 months, 6 months, and 1 year post-surgery, to assess visual acuity and check for possible complications such as infection. If blurred vision persists, timely medical consultation and early treatment are advised.
Under normal circumstances, blurred vision half a month after a semi-Femto laser surgery may be caused by corneal edema, eye strain, dry eyes, keratitis, or refractive regression. Improvements can be made according to the specific cause. It is recommended to seek timely medical attention and receive treatment under the guidance of a doctor. Detailed analysis is as follows:
1. Corneal Edema
Semi-Femto laser surgery causes some trauma to the corneal tissue, which may lead to corneal edema postoperatively. During recovery, it takes time for the edema to resolve, resulting in temporary blurred vision. Pay attention to resting your eyes, avoid prolonged visual tasks, and minimize screen time to allow sufficient recovery.
2. Eye Strain
If you use your eyes excessively during the first half-month after surgery—such as reading or spending too much time on computers or smartphones—the ciliary muscles of the eyes remain in a state of continuous contraction, easily leading to eye fatigue and reduced accommodation ability, causing blurred vision. Arrange your visual workload reasonably, perform gentle eye massages when needed, and apply warm compresses to relieve eye strain.
3. Dry Eyes
The surgery may damage the tear film of the eye, reducing tear secretion or altering its composition, leading to dryness. A poorly moistened corneal surface interferes with normal light refraction, thereby causing blurred vision. Improve your visual environment by using a humidifier indoors to increase air moisture, and avoid staying for long periods in dry areas such as near air conditioner vents.
4. Keratitis
After surgery, the cornea's defense mechanisms are weakened, making it more susceptible to infections from bacteria, viruses, or fungi, leading to keratitis. Inflammation can reduce corneal transparency and cause epithelial defects, resulting in blurred vision and possibly pain. It is recommended to use medications such as levofloxacin eye drops, diclofenac sodium eye drops, or ocular hydrogel containing deproteinized extract of calf blood under a doctor’s supervision.
5. Refractive Regression
Due to individual differences and other factors, refractive regression may occur after surgery. Changes in corneal healing—such as remodeling of the corneal stroma—can alter the originally corrected refractive power, leading to a decline in vision. Further comprehensive eye examinations may be required depending on the situation to determine whether an additional surgical intervention is necessary.
Generally, patients may experience a foreign body sensation and tearing on the day of surgery, though the severity varies among individuals and is usually tolerable. Resting with eyes closed can help alleviate discomfort, but no self-treatment should be attempted. Avoid forceful blinking, eye impacts, rubbing the eyes, or allowing dirty water to enter the eye. Regular follow-up visits after surgery are essential, and any unusual symptoms should be evaluated and treated promptly.
