Better Health: Smart Health Commentary Better Health (TM): smart health commentary

Article Comments

Turning Back The Clock Could Mean More Car Accidents: Tips For Better Night Vision

Our annual “fall back” time change that gives us an extra hour of sleep is welcome news for most of us. But there are some unintended consequences of darker evenings, especially for drivers. According to the National Safety Council, traffic death rates are three times greater at night than during the day.

In a special rebroadcast of the Healthy Vision with Dr. Val Jones show, I interviewed Dr. Christina Schnider, Senior Director, Professional Communications for VISTAKON® Division of Johnson & Johnson Vision Care, about common nighttime driving problems such as dry eyes, headaches, and eye fatigue. I also spoke with John Ulczycki, Group Vice President – Strategic Initiatives, for the National Safety Council, about safe driving tips. You can listen to the show here:

Most people experience a drop in visual acuity in the dark, and this can cause difficulty seeing traffic signs, pedestrians and roadside objects. The primary reason why it’s difficult to see at night is that our pupils dilate to let in as much light as possible. The trade off with large pupils is that visual acuity suffers. It’s normal for the average person’s visual acuity to drop from 20/20 to 20/40 in low light conditions.

Because of vision challenges, driving in low-light conditions can fatigue the eyes and head and neck muscles as the driver strains to see the environment more clearly. Dry eyes can occur from reduced blink rates and motor vehicle heating and cooling systems. Glasses wearers may have a reduced field of vision which further complicates driving in the dark. In fact, in a recent survey one -in-three drivers reported that they didn’t see well at night.

Dr. Schnider and Mr. Ulczycki suggest that night time driving may be safer (and more comfortable) with these tips:

1.  Update your eyeglass or contact lens prescription(s). Since darkness reduces visual acuity, wearing lenses that correct your vision to 20/20 in normal light conditions is extra important. Old glasses or contacts with outdated vision correction power can make driving in the dark more hazardous. If you experience significant challenges seeing at night, you may have a condition called “nighttime myopia” and should visit your eye doctor for advice.

2. Avoid driving long distances in low-light conditions. Since we already know that driving in the dark can cause eye fatigue, dry eyes, and reduced visual acuity, it’s best to minimize the time you spend behind the wheel during dark hours. Whenever possible, plan your travel so that the majority of your driving time occurs during daylight hours.

3. Take frequent breaks. Even though it’s tempting to push through your fatigue and finish driving those last miles to your destination, it’s safer to give yourself (and your eyes) a break. Stopping for gas or at a rest area may improve your alertness and visual fatigue. Remember that impaired drivers are more likely to be on the road at night, so vigilance on your part may prevent an accident.

4. Decrease your night-time driving speed. If you do need to drive in the dark, doing so more slowly may prevent accidents. Traveling at a slower speed can improve reaction time under lower-visibility conditions.

5. Check your headlights. It is estimated that 50% of all motor vehicle headlights are not optimally aligned. Potholes and bumps in the road can jolt the lights out of alignment. It’s important not to look directly at oncoming headlights. This can temporarily blind you as your pupils adjust to a quick change in lighting conditions.

For more safety tips, please listen to the full Healthy Vision podcast.

*Val Jones, M.D. is a paid consultant for Johnson & Johnson Vision Care, Inc.*


You may also like these posts

Read comments »


Comments are closed.

Return to article »

Latest Interviews

Caring For Winter Olympians In Sochi: An Interview With Team USA’s Chief Medical Officer Dr. Gloria Beim

I am a huge fan of the winter Olympics partly because I grew up in Canada where most kids can ski and skate before they can run and partly because I used to participate in Downhill ski racing. Now that I m a rehab physician with a reconstructed knee I…

Read more »

How Do Hospital Executives Feel About Locum Tenens Agencies And Traveling Physicians?

I recently wrote about my experiences as a traveling physician and how to navigate locum tenens work. Today I want to talk about the client in this case hospital side of the equation. I ve had the chance to speak with several executives some were physicians themselves about the overall…

Read more »

See all interviews »

Latest Cartoon

See all cartoons »

Latest Book Reviews

The Spirit Of The Place: Samuel Shem’s New Book May Depress You

When I was in medical school I read Samuel Shem s House Of God as a right of passage. At the time I found it to be a cynical yet eerily accurate portrayal of the underbelly of academic medicine. I gained comfort from its gallows humor and it made me…

Read more »

Eat To Save Your Life: Another Half-True Diet Book

I am hesitant to review diet books because they are so often a tangled mess of fact and fiction. Teasing out their truth from falsehood is about as exhausting as delousing a long-haired elementary school student. However after being approached by the authors’ PR agency with the promise of a…

Read more »

Unaccountable: A Book About The Underbelly Of Hospital Care

I met Dr. Marty Makary over lunch at Founding Farmers restaurant in DC about three years ago. We had an animated conversation about hospital safety the potential contribution of checklists to reducing medical errors and his upcoming book about the need for more transparency in the healthcare system. Marty was…

Read more »

See all book reviews »