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Home » What's New » Can you Really Go Blind from Looking at a Solar Eclipse?

Can you Really Go Blind from Looking at a Solar Eclipse?

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Last week, people in South America, Europe, North Africa, and parts of Asia and the Middle East saw a solar eclipse. As you may have heard, looking directly at a solar eclipse is very dangerous for your eyes and vision. Nevertheless, this rare event is something that many people want to experience when it does happen. While the next time Americans will have a chance to see a total eclipse will be in August 2017, this is what you need to know to be prepared in protecting your eyes when witnessing this rare event.

Dangers of the Sun

First of all, any time that you stare at the sun, the strong rays can kill cells in your retina. The retina is the light-sensitive area at the back of your eye which receives light from the lens of your eye and sends signals to the optic nerve. If the retina is damaged, this will cause you to go blind. The reason that most people don’t make as big of a deal about this on a regular basis as they do with a solar eclipse is that the sun light is so strong, most people don’t and aren’t able to stare at it. Usually your eye will automatically respond with ways to protect your retina by contracting the pupils, squinting or looking away.

A solar eclipse, however, goes through a number of stages and when the sun is partially eclipsed or most of it is covered, the light does not seem as bright, so the protective reactions from your eye don’t occur. Nevertheless, the part of the sun that is visible is just as strong and intense as looking at the full sun, leaving your eyes vulnerable and unprotected. Further, because a solar eclipse is such a unique event, many people are tempted to look - even when they know they shouldn’t, thinking that a few seconds of exposure can’t really do much harm.

This thinking is unfortunately very wrong.  You may be familiar with the science trick where you can light a paper on fire on the sidewalk using the sun and a magnifying glass. Sunlight is so strong, that when you concentrate the light with a lens, you can start a fire.  The lens of your eye similarly acts to concentrate the sun’s light onto your retina - basically burning it just like the paper in that experiment. A brief encounter -even a few seconds- between your eyes and this intense exposure to the sun is enough to do serious damage.

Usually people don’t realize right away that damage has been done since there is no initial pain with a retinal burn. It can often take several hours for symptoms to manifest and at this point it is already too late.

NEVER LOOK DIRECTLY AT AN ECLIPSE! In fact, you should never look directly at the sun.

Solutions for Viewing an Eclipse

There are a few options for safely viewing these rare events. First of all, you can purchase special eclipse glasses which are glasses made with specific lenses that block out dangerous wavelengths of light. Alternatively, you can make a pinhole projector which will project a miniature image of the eclipse onto the ground through a piece of cardboard or paper with a hole in it. You can learn how to make a pinhole camera on the NASA website.

So whether you are experiencing a solar eclipse or are out enjoying the warm sunshine, now you know how powerful the sun’s rays really are.

x

Dear Northwood Vision patient,

COVID-19 has the potential to cause grave harm to many of the citizens in our population. According to Harvard epidemiologist Dr. Mark Lipsitch it is likely that at least between 40-70 % of the population will become infected with COVID-19. This virus is twice as contagious as the flu. About 80 percent will not have severe concerns, but based on the current data, 20% of the infected will become severe or critical, needing some form of hospital care to do well. Currently, about 30 % of those who become classified as severe based on WHO classification, will not survive. These are the unfortunate realities at the moment.

Meanwhile, at Northwood Vision, we want to do as much as possible to minimize this risk, to prevent mortality and long term side effects, while doing our best to provide the services our patients need. We are convinced you care about these same things. (Read more)

Here is what we are asking you to do to make a smaller exposure footprint:

  1. If you have any symptoms of a cold or flu (coughing, fever, difficulty breathing, running nose, etc), please reschedule your appointment for at least one month from now.
  2. Try not to touch any surfaces in the office you do not have to touch.
  3. If you are trying on glasses, DO NOT put the frames back on the shelf. Rather, we will collect them from you for proper cleaning before they are returned to the shelves.
  4. If you are ordering contact lenses, a year supply (and some 6 month supplies) order can be direct shipped to your home at no cost. Please take advantage of this so you don’t have to come into the office more than necessary.
  5. If you do need to come into the office for an adjustment, please call the office at 727-725-5558 when you arrive in your vehicle. We will let you know if there is a wait and will put you on a list so we can call or text you to come therefore minimizing the time you are in the enclosed space of our office.
  6. Please come to your appointment with the least number of people possible to reduce exposure to them and to others at the office.
  7. If you have any loved ones that have been exposed to the virus or certainly if they have symptoms of a respiratory illness, please wear a mask in case you are an asymptomatic carrier, or if possible, wait at least 4 weeks before coming in for non-essential care.

In an effort to protect you, here is what we are doing to help lower your risk:

  1. All surfaces in the office will be cleaned several times per day with antiviral/antibacterial cleaner. Surfaces in the exam room will be cleaned thoroughly in between each patient.
  2. No sick or symptomatic staff will be permitted to work while sick with a known viral respiratory infection or symptoms, or while directly caring for a sick relative/friend.
  3. For your safety, payments can be done ahead of time over the phone if you call ahead. This will decrease the amount of time you are in the store and your exposure risk in our enclosed space.
  4. No glasses frames other patients try on will be put back on display until the frames are cleaned with an antiviral cleanser.
  5. We are actively asking patients to reschedule for 4 weeks later if they have any symptoms themselves or in their family/ social network.
  6. We are giving options for patients to acquire goods by mail rather than coming into the store.
  7. We altering our schedule to decrease the number of patients that might be in the office at the same time to maximize social distancing.
  8. We are practicing frequent hand washing at our office to protect you and each other.
  9. We will ask patients to reschedule if they present to our clinic with a cough or other COVID-19 symptoms.

Thank you for your patience and understanding during this stressful and trying time. Let us all work together to lower risk of the spread so that less people die and less people have permanent side effects from COVID-19. Each of us can do our part. May God bless each of you and keep you well. Thank you for your understanding and care for your fellow humans.

Dr. Christopher K. Keats, OD