LASIK (Laser-Assisted In Situ Keratomileusis) is a common surgical procedure correcting vision problems like nearsightedness, farsightedness, and astigmatism. It reshapes the cornea, the clear front part of the eye, allowing light to focus properly on the retina and reducing or eliminating the need for glasses or contacts. While highly successful in improving daytime vision, some individuals may experience changes in their night vision following the procedure. These changes are typically temporary and often improve as the eyes heal and adapt.
Understanding Post-LASIK Night Vision Changes
After LASIK surgery, the reshaping of the cornea can sometimes lead to visual phenomena that are more noticeable in low-light conditions. Common experiences include glare, which makes bright lights appear overly intense, and halos, which are luminous rings seen around light sources such as streetlights or car headlights. Starbursts, characterized by streaks or rays radiating outwards from lights, can also occur. These effects are largely due to the way light interacts with the newly sculpted corneal surface, particularly when the pupil dilates in dim environments, extending beyond the treated area.
The eye’s natural inflammatory response to the surgery can cause temporary swelling in the cornea, contributing to these visual disturbances. As the cornea heals, the optical zone may shrink. When the pupil dilates larger than this effective optical zone, unfocused light rays can enter the eye, creating the appearance of starbursts and halos.
Everyday Strategies for Improvement
Managing night vision changes after LASIK often involves practical adjustments and supporting the eye’s natural healing process. Wearing anti-glare glasses can help reduce reflections and improve clarity, especially when driving at night. These glasses often feature anti-reflective coatings and sometimes a yellow tint to enhance contrast in low-light conditions.
Adjusting driving habits can also make a difference; for instance, increasing following distance provides more reaction time, and using defrosters can reduce condensation that might exacerbate visual distortions. Avoid looking directly at oncoming headlights to minimize glare. At home, optimizing lighting environments means opting for soft, ambient, and indirect light, such as that from table or floor lamps with warm, low-wattage bulbs. Avoiding harsh overhead lights, like strong LEDs or fluorescent bulbs, can reduce discomfort and glare.
Ensuring proper eye hydration is another helpful step, as dry eyes can worsen vision issues. Lubricating eye drops can provide relief by moisturizing the eyes and promoting tear stability. Additionally, patience is important, as night vision often improves naturally as eyes heal over several months.
When to Consult Your Eye Doctor
If night vision issues persist or worsen beyond the typical healing period of a few weeks to several months, it is advisable to consult your eye doctor or surgeon. Persistent symptoms could indicate underlying causes that require professional assessment. Your doctor can evaluate the specific reasons for the ongoing disturbances and discuss various medical interventions.
Treatment options might include prescription eye drops to temporarily shrink the pupil if needed. If significant residual refractive error remains, enhancement surgery may be considered to refine the initial correction. If corneal irregularities are identified, specific treatments or specialized contact lenses might be recommended to help smooth the eye’s surface and improve vision. Your eye doctor can also rule out other potential eye conditions that may be affecting your night vision.