Archive for July, 2011

Matterhorn lens

Thursday, July 21st, 2011

Abnormal lens formation: The normal anterior spherical curvature of the lens is replaced by an abnormal conical or spherical forward protrusion, in this case like the famous Swiss Matterhorn.

Anterior lenticonus of the right eye of a 71 year-old female patient is shown with no history of kidney disease but the same ocular findings in her mother. Visual acuity only light perception. In advanced cases cataract formation is visible.

Lenticonus anterior - "Matterhorn lens"

Lenticonus anterior - "Matterhorn lens"

Lenticonus anterior - Protrusion

Lenticonus anterior - Protrusion

Clinically high myopia and irregular astigmatism are caused due to the increased curvature of the central lens area. The normal anterior spherical curvature of the lens is replaced by an abnormal conical or spherical forward protrusion, in this case like the famous Swiss Matterhorn. Anterior lenticonus may be associated with ocular manifestation of Alport syndrome that shows different modes of inheritence and primarily affects the glomeruli, the tiny tufts of capillaries in the kidneys and may leed to hearing loss.

3D Stereo view of lenticonus anterior

3D Stereo view of lenticonus anterior

OCT laserscanner shows that the normal anterior spherical curvature of the lens is replaced by an abnormal conical or spherical forward protrusion. Cataract formation.

OCT laserscanner shows that the normal anterior spherical curvature of the lens is replaced by an abnormal conical or spherical forward protrusion. Cataract formation.

3D OCT: abnormal conical or spherical forward protrusion

3D OCT: abnormal conical or spherical forward protrusion

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Coloboma versus change the color of your eyes

Tuesday, July 5th, 2011

There are those in which the iris is not grown together nicely since birth. The leaf tissue shows a gap (coloboma) like an inferior hole or a keyhole pattern. These patients are often impaired by glare sensation, visual impairment, cataract, glaucoma and retinal changes/detachment (amotio retinae).

Such a case of coloboma is described in the getoct database: explore database and register for free.

A coloboma (meaning “defect”) is a gap in part of the structures of the eye, such as the iris, retina,
choroid, optic disc and very rarely the eyelid. This lesion is caused when a baby’s eyes do not develop properly during pregnancy and most lesion appear without any previous family history.  There is not a real hole in the eye, but certain tissues within the eye did not fully form.

A coloboma is seen at birth from outside as a keyhole-like shape of the pupil. Inner lesions only can be found by an ophthalmologist, an eye doctor who will carry out a full eye examination.
Typical coloboma normally is located in the bottom part of the eye at 6 o’clock position on the face of a clock:

 

Healthy eye versus coloboma

Healthy eye (left) versus coloboma (right): The gap of a coloboma is found mostly at the bottom of the eye and runs from the front to the back of the eye but only affects the iris most commonly leaving a fairly good vision after cataract surgery. This pupil is round indeed, but eccentrically (Corectopia).

 

Inner eye coloboma (retina, choroidea)

Inner eye coloboma (retina, choroidea). Normal optic nerve (top).

 

OCT: cup-shaped, posterior, whitish protuberance in the range of  lower eye layers

OCT: cup-shaped, posterior, whitish protuberance in the range of lower eye layers. Normal central retina leaving a fairly good vision.

To help these people special implants have been developed, which can cover the defect. If the coloboma is situated well, such an implant can reduce light intensity and discomfort due to too much light.

Irisimplants

Irisimplants

Be special – make you special

There are other people who are healthy but want to change their current eye color easy to feel better, to please others or simply make something special out of themselves. What do you think?

Iris change of color with eye implants

Iris change of color with eye implants

Iris change of color with eye implants

Iris change of color with eye implants