Skip to main content
Home » What's New » How Do We See?

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.

As of Tuesday evening, March 17, the Centers for Disease Control and Prevention have recommended all routine eye care be deferred until further notice in order to slow the transmission of COVID-19 throughout our community.

We will remain available to triage eye emergencies as well as help you with routine matters during this challenging time.

During this period of social distancing and quarantine, we must all do our part by restricting activities outside the home except for getting medical care.

⦁ Routine Eye Exams: If you are scheduled for a routine eye examination appointment for the remainder of March and early April, we will reschedule your appointment. As of March 18, 2020, we will begin rescheduling routine eye examination appointments for April 8, 2020 and beyond.
⦁ I need to replace my glasses. What do I do? Please contact us at phone number: 916-971-3937, text number: 916-919-8877, or info@seeustosee.com. We may be able to extend your prescription during this time and will help you with your eyewear needs.
⦁ I’m nearly out of contact lenses. What do I do? Please contact us at phone number: 916-971-3937, text number: 916-919-8877, or info@seeustosee.com. We may be able to extend your prescription during this time, and/or place an order for your contact lenses and have them shipped to your house.
⦁ I need a refill on the medication prescribed to me by the practice. What do I do? Please contact us at phone number: 916-971-3937, text number: 916-919-8877, or info@seeustosee.com. We can transmit a refill for your prescription directly to your pharmacy so that you have the medication that you need.
⦁ What about an eye emergency? What can I do? If you have an ocular emergency, we are, as always, available to help you at any time. Call 916-919-8877 and wait for instructions at the end of the message.

Drs. Schauffele & Fleischmann will do their best to accommodate emergencies in the office whenever possible.

We have asked the majority of our staff to stay home until further notice to protect them, our patients, our community, our nation, and our planet. Despite the financial and emotional hardships this will cause, we ask every one of you to do the same.

Together we will weather this storm.