The ability to see is dependent on the actions of several components in and around the eye.
When looking at an object, light rays are reflected from the object to the cornea. The lights rays are refracted and focused by the cornea and the lens. The lens allows the light rays to focus sharply on the retina, and results as an upside-down image. The retina then converts the light rays into electrical impulses which are transmitted through the optic nerve to the brain. The brain translates the image and the result is an image in the upright position.
The human eye is similar to a camera. A camera needs a lens to focus an image and film to produce an image. In that way, the eye needs a lens (cornea, lens) to refract and focus light and a film (retina) on which to focus the light rays. If any one or more of these components is not functions properly, the result is a poor image. The retina, representing the film in a camera, captures the image and sends the picture to the brain to be developed. The macula is the highly sensitive central area of our retina that is responsible for our central focusing vision. It is the most used part of the retina
MYOPIA: Nearsightedness
Myopia, also known as nearsightedness is when the light entering the eye focuses in front of the retina rather than on the retina. Nearsighted people typically see well up close but poorly at a distance. This is caused by the eye being longer than a normal eye.
HYPEROPIA: Farsightedness
Hyperopia, also known as farsightedness, is when the light entering the eye focuses behind the retina rather than on the retina. Farsighted people typically have difficulty seeing up close and at a distance. This is caused by the eye being shorter than a normal eye.
ASTIGMATISM:
Astigmatism is when the front surface of the eye called the cornea is oval like a football rather than spherical like basketball. The cornea has 2 points of focus, a steeper point and a flatter point that causes light to focus at one or more points onto the retina, resulting in blurry vision for distance and near.
Ryan D. Meffley, O.D. joined Sugarbush Eye and Laser Centre in March 2008. Dr. Meffley completed his undergraduate studies at The Ohio State University where he graduated with a Bachelor of Science in Biology. In 2001, he earned his Doctor of Optometry degree from Nova Southeastern University in Fort Lauderdale, Florida. During his optometric training, Dr. Meffley spent additional time studying ocular disease and refractive surgery at The Sight Foundation in Fort Lauderdale, Florida. Upon completion of his education, Dr. Meffley joined a large group practice in Cincinnati, Ohio, where he practiced primary care optometry and specialized in contact lens fittings. Prior to joining Dr. Gupta at Cleveland Clinic Sugarbush Eye and Laser Centre, Dr. Meffley was clinical director of LASIK Vision Institute in West Chester, Ohio, where he provided pre-operative and post-operative care for LASIK and PRK patients. During his time at LASIK Vision Institute, he also served on the Physicians Review Committee. Dr. Meffley is originally from Stow, Ohio, and is an avid Ohio State Buckeyes fan.
Ryan D. Meffley, O.D. joined Sugarbush Eye and Laser Centre in March 2008. Dr. Meffley completed his undergraduate studies at The Ohio State University where he graduated with a Bachelor of Science in Biology. In 2001, he earned his Doctor of Optometry degree from Nova Southeastern University in Fort Lauderdale, Florida. During his optometric training, Dr. Meffley spent additional time studying ocular disease and refractive surgery at The Sight Foundation in Fort Lauderdale, Florida. Upon completion of his education, Dr. Meffley joined a large group practice in Cincinnati, Ohio, where he practiced primary care optometry and specialized in contact lens fittings. Prior to joining Dr. Gupta at Cleveland Clinic Sugarbush Eye and Laser Centre, Dr. Meffley was clinical director of LASIK Vision Institute in West Chester, Ohio, where he provided pre-operative and post-operative care for LASIK and PRK patients. During his time at LASIK Vision Institute, he also served on the Physicians Review Committee. Dr. Meffley is originally from Stow, Ohio, and is an avid Ohio State Buckeyes fan.