Emmetropia is the term used to describe an eye that requires no correction to allow for sharp, clear vision at all distances. As light passes into the eye, it is directed to one sharp point of light that falls on the visual receptors in the retina on the back of the eye, called the fovea or macula. The lens of the eye bends to help focus the eye on objects that are near and relaxes to focus on things far away allowing for good vision at a large range of distances.
Near-sightedness or Myopia
This is the condition in which a patient can see things up close better than farther away. As light passes into the eye, it is focused to one sharp point of light that falls in front of the fovea or macula within the retina. Therfore, when the light reaches the fovea where the visual receptors are, the light is a blur area instead of a sharp point resulting in blurry vision. To correct, a minus power lens is placed on or in front of the eye refocusing the light to the fovea resulting in clear vision for our patients.
This is a condition in which a patient sees things at a distance better than he or she can see things at a near. This condition is often confused with presbyopia, or the loss of accommodative or focusing ability that happens around age 40. As light passes into an eye with hyperopia, the light is focused to one sharp point of light that falls behind the fovea or macula within the retina. Due to the focusing ability of the eye, however, a young patient can often achieve good distance vision by straining his or her eyes to see. Although distance vision is often alright, reading and near work suffer because either there is not enough focusing ability left to see clearly at near, or the strain caused by the excessive focus demand causes headaches or double vision. Glasses or contact lenses are prescribed to allow for comfortable, relaxed distance vision so that the focusing needed for near is within the normal focusing range.
This is a condition in which a patient often struggles with sharp vision at both distance and near. As light passes into the eye, the light is not focused to one sharp point on the back of the eye. Instead, the light is focused to an area of points called a blur circle. The larger the size of the blur circle, the wider the range of points the light is focused to. As this blur circle increases in size, the amount of astigmatism a patient has and needs corrected is increased. Astigmatism is corrected by placing a lens on or in front of the eye that refocuses light to a single point on the fovea or macula providing clear vision.
This is the condition in which a patient loses the ability to focus on near objects around the age of 40. Presbyopia occurs because the lens in the eye becomes less flexible as the aging process progresses. This loss of flexibility results in an inability of the lens to change the point of focus from a distance object to a near object. As a result, reading or bifocal glasses are prescribed to focus the light onto the macula or fovea while viewing a near object.
Emmetropia is the term used to describe an eye that requires no correction to allow for sharp, clear vision at all distances. As light passes into the eye, it is directed to one sharp point of light that falls on the visual receptors in the retina on the back of the eye, called the fovea or macula. The lens of the eye bends to help focus the eye on objects that are near and relaxes to focus on things far away allowing for good vision at a large range of distances.
This is the condition in which a patient can see things up close better than farther away. As light passes into the eye, it is focused to one sharp point of light that falls in front of the fovea or macula within the retina. Therfore, when the light reaches the fovea where the visual receptors are, the light is a blur area instead of a sharp point resulting in blurry vision. To correct, a minus power lens is placed on or in front of the eye refocusing the light to the fovea resulting in clear vision for our patients.
This is a condition in which a patient sees things at a distance better than he or she can see things at a near. This condition is often confused with presbyopia, or the loss of accommodative or focusing ability that happens around age 40. As light passes into an eye with hyperopia, the light is focused to one sharp point of light that falls behind the fovea or macula within the retina. Due to the focusing ability of the eye, however, a young patient can often achieve good distance vision by straining his or her eyes to see. Although distance vision is often alright, reading and near work suffer because either there is not enough focusing ability left to see clearly at near, or the strain caused by the excessive focus demand causes headaches or double vision. Glasses or contact lenses are prescribed to allow for comfortable, relaxed distance vision so that the focusing needed for near is within the normal focusing range.
This is a condition in which a patient often struggles with sharp vision at both distance and near. As light passes into the eye, the light is not focused to one sharp point on the back of the eye. Instead, the light is focused to an area of points called a blur circle. The larger the size of the blur circle, the wider the range of points the light is focused to. As this blur circle increases in size, the amount of astigmatism a patient has and needs corrected is increased. Astigmatism is corrected by placing a lens on or in front of the eye that refocuses light to a single point on the fovea or macula providing clear vision.