Struggling to find your way around a dark room, or squinting at oncoming headlights while driving at night, might be more than just tired eyes. This is called night blindness, or nyctalopia, and it isn't a condition on its own so much as a symptom pointing to something else going on in the eye. It can show up gradually over years or fairly suddenly, depending on what's driving it, and the underlying causes range from simple to something that needs a specialist's attention fairly quickly.
Dr. Vaishal Kenia, Chairman and Medical Director at Eye Hospital in Mumbai, says: "Night blindness gets brushed off a lot, especially when it comes on slowly. People assume their eyes are just tired, or that everyone struggles a bit in low light. Sometimes that's true. But when someone tells me they've started avoiding night drives altogether, that's usually a sign we need to look closer at what's actually happening in the retina."
What Causes Night Blindness?
Nearsightedness (myopia) is one of the more common and fixable reasons behind poor night vision. Uncorrected or under-corrected myopia makes it harder for the eye to focus properly once light levels drop, and glare from headlights can make it worse. Options like LASIK correct the underlying refractive error rather than just masking the symptom.
Cataracts cloud the eye's natural lens over time, and that clouding scatters light instead of letting it pass through cleanly. It's a big reason older adults often notice night driving becoming harder years before it affects their daytime vision. Cataract surgery replaces the clouded lens and, for a lot of patients, brings back night vision that had quietly faded away.
Vitamin A deficiency is less common in places with a varied diet, but it still shows up, particularly in people with certain digestive conditions or restrictive diets. Vitamin A is essential for the retina's rod cells, which handle vision in low light, and a deficiency can affect them directly.
Retinitis pigmentosa is a genetic condition where the retina slowly loses its rod cells, and night blindness is often the very first sign, sometimes appearing years before any other vision changes. Because it's progressive, catching it early matters for how it's managed going forward.
When Should You See a Doctor?
If night vision has been getting worse over months rather than staying steady, that's worth mentioning to an eye doctor rather than waiting it out. A gradual decline often points to something treatable, and catching it early tends to make a real difference.
Struggling with everyday tasks, like driving after dark, walking through a dim parking lot, or moving around the house at night, is a practical sign that it's time for an exam rather than something to just adapt around.
A proper workup usually goes beyond a basic eye chart. Tools like OPD Scan III and OCT let a doctor look closely at the retina itself, which matters a lot when a condition like retinitis pigmentosa is on the table.
A family history of retinal disease is a good enough reason on its own to get checked, even before symptoms become obvious. Genetic retinal disorders tend to run in families, and earlier diagnosis generally means more options for managing the condition.
If you've been reading up on colour perception too, our earlier post on colour blindness causes and correction covers a related but distinct part of how the retina works.
Why Choose Kenia Eye Hospital?
Kenia Eye Hospital has been treating patients in Santacruz (West), Mumbai since 1998, with the diagnostic depth to tell the difference between a simple refractive cause of night blindness and a retinal condition that needs ongoing management. OPD Scan III, OCT, and detailed retinal imaging help pinpoint exactly what's behind the symptom, rather than guessing from a chart alone.
NABH, QAI, and FEQH accredited. CGHS empanelled. Call +91 75064 99962 or book a consultation if night vision has been giving you trouble.
