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To Our Valued Patients,

With the evolving situation of the Coronavirus (COVID-19) pandemic and under the guidelines of the Health Officer of the Alameda and Contra-Costa Counties, our offices are open to provide eye and vision care.

Please keep in mind that in order to maintain social distancing protocols and to limit further transmission of the virus, we will be working with a reduced staff and seeing a fewer number of patients as compared to our “normal” schedule. Priority will be given to the most urgent medical cases. We will be implementing a number of measures (including altered check-in/check-out procedures, limiting the number of patients in the office and waiting room, face covering for all persons, temperature screening, etc) that will change your experience in the office. In addition, we will be ramping up our already strict disinfection policies and we will continue to monitor and abide by all local, state and, federal guidelines. Please bear with us through this new reality as these changes are designed to protect you and our staff.

We hope to see you soon and appreciate your trust in us to continue to meet your eye care needs. Stay safe and stay healthy!

The Turner Eye Institute Team

Home » Eye Care » Eye Anatomy

Eye Anatomy

How the Eye Works

The normal eye has the ability to receive pictures in the form of light and transmit those images to a part of the brain called the visual cortex, creating the picture that you see.

eyeThe ability to see clearly is determined by the shape of the cornea, the shape of the natural lens and the length of the eye. In the normal eye, these elements work together to focus light rays on the retina. In this situation, a crisp, clear image is transmitted to the brain.

Light first passes through the cornea, a transparent curved “window” at the front of the eye. The curve of the cornea bends light to focus it through the pupil, a round opening in the center of the iris.

The cornea is the main focusing part of the eye, accounting for approximately 70 per cent of the eye’s focusing power. The lens of the eye is located right behind the pupil. Light focused by the cornea through the pupil is further focused by the lens onto the retina, a light sensitive membrane on the back wall of the eye.

The retina changes the light rays into electrical impulses and sends them to the brain via the optical nerve, where they are translated into visual images.