Still Seeing Glare or Light Streaks at Night? Higher Order Aberrations May Be the Cause
Have you recently had your eyes checked or updated your glasses and contact lenses, only to still notice oncoming headlights bursting into large geometric shapes or auras of light when driving at night? Or have you looked at a distant streetlamp and seen a fuzzy halo or long streaks radiating from it?
If this sounds familiar, it may be more than tired eyes. If these symptoms do not go away or improve with blinking or artificial tears, higher order aberrations (HOAs) may be affecting the quality of your vision.
Most people are familiar with common vision problems such as nearsightedness (myopia), farsightedness (hyperopia), and astigmatism. HOAs, however, are more complex optical imperfections that traditional glasses and contact lenses often cannot correct. When your pupils dilate in low light, these subtle distortions can become major obstacles to clear night vision, causing glare, halos, starbursts, and streaks around lights. These visual symptoms can be very debilitating, but with OVITZ advanced wavefront technology, these complex visual problems finally have a highly effective solution.
What Are Higher Order Aberrations (HOAs)?
To understand why night driving can feel difficult, it helps to know how light moves through the eye. In an ideal optical system, light passes smoothly through all the layers of the eye to focus as a sharp, singular point on the retina.
However, human eyes are rarely perfectly symmetrical. Tiny imperfections, especially in the cornea, can bend or
scatter light unevenly. These microscopic irregularities create HOAs, which cause asymmetric visual distortions that often become more noticeable at night. Because our eyes are natural, living organs, everyone has some degree of HOAs. However, when those levels are elevated, they can significantly disrupt a person’s quality of life.
What Causes Higher Order Aberrations?
Some people are born with more irregularly shaped eyes than others, but several factors can also introduce or worsen HOAs over time.
⠀⠀⠀⠀Keratoconus and Corneal Ectasias
Conditions like keratoconus and other forms of corneal ectasia cause the clear front surface of the eye to thin and bulge into an irregular cone shape. This warped shape creates severe, complex HOAs that lead to highly distorted and uncomfortable vision.
⠀⠀⠀⠀Past Eye Injuries
Physical trauma to the eye can cause uneven healing and permanent corneal scarring. Damage to these delicate ocular structures permanently alters the eye shape, introducing unique optical imperfections that increase visual distortion.
⠀⠀⠀⠀Prior Eye Surgeries
Surgical procedures involving the cornea can sometimes inadvertently induce HOAs. If the treatment area leaves behind microscopic surface irregularities or uneven edges, patients may experience persistent night vision issues and complex distortions like ghosting or double vision.
⠀⠀⠀⠀Natural Aging
Higher order aberrations naturally increase as the eye’s internal structures change over time. Subtle shifts in the curvature of the cornea or the composition of the crystalline lens alter how light bends, creating internal distortions even before age-related conditions like cataracts fully develop
Why Night Vision Changes in Different Light: The Role of the Pupil
Some people with HOAs can see clearly during bright daylight and may even test at 20/20 during a standard eye exam. But in dim lighting, their visual quality can drop quickly.
This shift is largely due to a normal physiological response called pupil dilation. Think of your pupil like the aperture or opening of a camera lens. It changes size to control how much light enters your eye. This simple movement changes how well you can see.
Bright Light and Constricted Pupils: How Your Eye Filters Out HOAs
In bright light, your pupil shrinks to limit how much light enters the eye. That light passes through a smaller central portion of the cornea and lens, which can reduce the impact of optical irregulari
ties in the outer areas of the eye. This natural filtering helps explain why vision may seem clearer in bright settings.
Low Light and Dilated Pupils: Why HOAs Become More Noticeable
When darkness falls, your pupil has to dilate and enlarge to let in as much light as possible to help you see in the dark. However, a large pupil size comes with some major optical trade offs:
- ⠀⠀⠀⠀Larger Area of Irregularity: As the pupil expands, light has to pass through more uneven peripheral areas of the eye. This can result in a compounding negative effect on your vision
- ⠀⠀⠀⠀Exponential Effects: Studies have shown that as your pupil size increases, visual distortions do not just get a little bit worse. Instead, they spike dramatically. When your pupil dilates from moderate to large, the quantity of these visual distortions can actually increase significantly.
- ⠀⠀⠀⠀Indistinct Focal Point: With a large pupil size, more light rays enter the eye, which can produce more light scatter and disorganized light waves. These unfocused light rays are the reason we see glare, halos, and starbursts.
Essentially, eyes are built to prioritize light gathering over absolute clarity in the dark. While a dilated pupil helps you see in dim environments, it also highlights the hidden structural imperfections in your eyes, causing the frustrating visual distortions that make night driving so difficult.
Common Nighttime Visual Symptoms Caused by HOAs
When excessive peripheral light enters through your dilated pupil, it does not just make your surroundings look blurry–it can present as highly disruptive patterns.
These visual artifacts make nighttime navigation uncomfortable and sometimes unsafe, leading many people to lose confidence or avoid driving after dark altogether. Beyond the safety concerns on the road, these visual symptoms can cause severe eye strain, physical fatigue, and frequent headaches or migraines.
Here are some common nighttime visual symptoms of HOAs:
Glare occurs when bright light scatters inside the eye and washes out the surrounding visual field. High intensity LED headlights, for example, can spread across your view, sharply reducing contrast and making the road ahead much harder to see.
Halos appear as bright, blurry rings around light sources. At night, they can blur the edges of illuminated signs, making words difficult to read until you are very close.
Starbursts are thin rays of light that radiate from a bright point. They can turn taillights or headlights into distracting spikes that obscure pedestrians, lane markings, or road debris.
How Eye Doctors Diagnose HOAs
Traditional eye charts and phoropters cannot measure HOAs. Instead, eye care professionals use advanced diagnostic technology called an aberrometer.
An aberrometer sends a safe beam of light into the eye. This light passes through all the layers and tissues of the eye, where a digital sensor captures the returning pattern and records how light travels through your unique ocular structure. This scan provides an incredibly detailed, microscopic map of all the optical imperfections responsible for reduced night vision.
However, a standard aberrometer on its own is simply a diagnostic tool. It can identify and measure your distortions, but it cannot fix them. This is where the OVITZ xwave system bridges the gap between diagnosis and treatment. By fully integrating with the aberrometer, the OVITZ platform captures that complex raw data and instantly translates it into a highly customized optical correction. This allows eye doctors to move beyond simply identifying your visual roadblocks, giving them the precise technology needed to actively target and neutralize them.
Treatment and Management Options
Living with HOAs does not mean you have to avoid going out after dark. Advances in optical technology now offer highly effective ways to improve night vision. If updating your glasses and contact lenses did not help, these more advanced options may be the next step.
⠀⠀⠀⠀Scleral Lenses
For more severe HOAs, standard soft contact lenses may not help because they conform to the irregular shape of your cornea. Scleral lenses are large, rigid gas permeable lenses that vault completely over the cornea and rest on the white part of the eye, called the sclera.
The space between the lens and cornea is filled with sterile saline, creating a smooth, liquid reservoir. This liquid effectively replaces your irregular cornea with a perfectly smooth optical surface, neutralizing many corneal HOAs and greatly reducing halos and starbursts.
⠀⠀⠀⠀Wavefront Guided Scleral Lenses and the OVITZ xwave System
While standard scleral lenses are excellent for correcting corneal irregularities, they sometimes leave behind residual HOAs (Read: Why Don’t My Scleral Lenses Fix All My Visual Ghosts). To correct these remaining distortions, patients need the highest level of customization: wavefront guided scleral lenses powered by OVITZ technology.
The OVITZ xwave system is a major breakthrough in specialized eye care. Instead of relying on trial and error, the OVITZ system utilizes proprietary software to analyze the exact wavefront data captured during your diagnostic exam. It measures the unique, microscopic ways that light bends and scatters through your individual eye.
The OVITZ software then translates this complex data into a highly precise, customized optical correction that is etched onto your scleral lens. By matching the exact opposite profile of your eye’s unique optical distortions, the OVITZ xwave lens acts as a personalized shield, systematically canceling out both lower and higher order aberrations as light enters your pupil. The result is unprecedented visual clarity, improved contrast, and a dramatic reduction in night driving symptoms.
Reclaiming Confidence in the Dark
Higher order aberrations can make a routine evening drive feel stressful and exhausting. If glare, starbursts, or halos make you blink, squint, or avoid driving at night, basic lifestyle adjustments may not be enough.
The first step toward clearer night vision is looking beyond the standard eye chart. An eye care professional with advanced wavefront diagnostic tools can map the hidden contours of your eyes, identify the aberrations causing your symptoms, and recommend optical solutions to help you see more clearly and confidently after dark.
Find an OVITZ Authorized Doctor
If starbursts and light streaks are affecting your night vision, an OVITZ-Authorized Doctor can help. Using advanced corneal mapping and wavefront guided technology, they can design specialty contact lenses tailored to your eye shape and correct distortions that standard lenses cannot address, helping you regain clearer night vision and greater peace of mind on the road.