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How Do We See?

Have you ever thought about how vision works? Seeing is an incredible gift made possible by a system in which the eye and the brain process visual information from the outside world. If any step of that process does not function properly, vision will be impaired.

Similar to a camera, the eye transmits light from the world around us into an image that we can perceive. Certain parts of the eye even function like the different parts of a camera such as the shutter, the lens and film (if we can hearken back to the days when we used film in cameras). Here is a quick breakdown of the fascinating way our eyes and brain enable us to see and experience the world around us:

The Vision Process

Light reflected from an object in our field of view is gathered by the cornea which is essentially the clear “window” to our eye. The cornea then refracts the light rays through the pupil (the center of the iris where light enters the eye). The iris, which like the shutter of a camera will enlarge and shrink based on how much light is coming in, then passes the image onto the crystalline lens. Just like a camera lens, the lens in the eye focuses the light rays, projecting them to a point at the back of the eye called the retina, where the image will appear upside down. The retina contains a thin layer of color-sensitive cells called rods and cones that perceive color.

From the retina, the visual signals travel to the brain via the optic nerve. The brain receives information from both eyes and must then converge the images (and flip them right side up) to get a complete picture.

Vision Problems

A breakdown in vision can happen at any point in this process. From the muscles that control the eyes, to the parts within the eye, to the pathway to the brain. Sometimes vision impairment is due to technical problems with the eye receiving the information and passing the signal on, such as convergence insufficiency (inability to coordinate the eyes to converge on one point), myopia (nearsightedness) or cataracts (clouding of the lens).

Other times, the eyes might work perfectly, but there is a problem with the brain interpreting the signals it receives. In these cases we can’t “see” in the traditional sense, because our brains aren’t able to properly “read’ the signals or we don’t know what we are looking at. This is the case for some learning disorders that are caused by the visual processes in the brain such as dyslexia.

As you can see, vision is quite a complicated process. A simple vision exam isn’t always able to determine vision problems, especially in children which is why it is so important to have regular comprehensive eye exams, to measure the health of the eye and all of its parts.

Due to the rapidly evolving situation with the COVID-19 pandemic, and to continue our commitment to the safety of our patients and community, Vintage Optical will be postponing all routine eye care visits. We will continue to be available for all essential and emergency care during this time.

 

While our office will be closed for non-medical care, there are a few ways we can help with other eye care needs at this time:

If you are scheduled for a non-medically necessary visit in the upcoming weeks, we will call you to postpone your exam to a later date. We ask for your understanding and appreciate your help in reducing the spread of infection in our community.

 

In light of this need to limit community exposure, Vintage Optical will be working with an accelerated telemedicine program to provide certain urgent care needs to our patients from their home.

 

If you have an urgent eye care need, please do NOT go directly to the emergency room, but call our office at 309-263-8611. If appropriate, we will schedule a virtual visit with one of our doctors to address your needs and do our part in protecting our community. If your eye care needs would be better addressed in person, we will continue to be available for in-office emergency care throughout this crisis. As always, if you have a life-threatening emergency, please call 911. We appreciate your help in reducing the burden on emergency departments and urgent care centers during this time.

 

We have wonderful patients and love seeing you in our office, and while this is yet another inconvenience during an already stressful time, we're doing everything we can to limit the effects of this pandemic on our community.

 

-       Drs. Velting, Sommer, and the entire team at Vintage Optical