Search Eye Pictures

Tuesday, August 6, 2019

ABMD Dots

These are likely the "dots" that we sometimes see in anterior basement membrane dystrophy.

Tuesday, July 30, 2019

Wednesday, July 10, 2019

BAND KERATOPATHY

Band keratopathy affects the cornea, the front clear window of the eye. Band keratopathy is a calcium deposit that appears grayish with holes in the middle, like swiss cheese.  It starts from the 9:00 and 3:00 edge of the cornea and works it's way toward the center.  Rarely it can encroach on the visual axis, and in these cases it can be removed by a process called chelation. 
Band keratopathy can be caused by anything that increases calcium in the body. Some of these are as follows:  kidney disease, excessive vitamin D, high thyroid levels, sarcoidosis, lupus and Paget’s disease. Also there is calcium in the tears. 
Band keratopathy can be associated with several other eye conditions including severe glaucoma, chronic uveitis, corneal dystrophies, and phtisis bulbi (shrunken eye from severe loss of vision). 
In most situation band keratopathy has no symptoms.  Occasionally it can cause redness, irritation, and vision loss, depending on how advanced it is.  
Chelation is a process that uses a special chemical and an excimer laser to remove the deposits.  

Wednesday, June 19, 2019

DIABETIC RETINOPATHY

Diabetic retinopathy has been the number one cause of preventable blindness in the United States.  Fortunately treatments have improved through the years.

The pictures below show patients with moderate non-proliferative diabetic retinopathy.  There are various types of hemorrhages.  Cotton wool spots are areas of focal oxygen deprivation.  microaneurysms are outpouchings of capillaries that can leak.  Exudates are the leakage of blood serum from capillaries.




If the oxygen deprivation is severe enough, new blood vessels (neovascularization) will begin to form in the attempt to reperfuse the retinal tissue.  However, these new blood vessels are very leaky and certain contents from the blood destroy the retina, thereby causing severe vision loss.   When new blood vessels grow, retina specialists often will perform pan-retinal photocoagulation, or PRP.  PRP selectively destroys much of the peripheral retina, thereby decreasing the oxygen deman in the eye.  This decreased oxygen demand allows the most important central part of the eye to receive enough oxygen to prevent neovascularization.   The photo below shows the laser scars that result in the peripheral retina from PRP.







Thursday, June 13, 2019

TREATED RETINAL TEAR

This picture shows laser scars around the tear in the retina that would have ended up as a detached retina with accompanying permanent loss of vision.


ASTEROID HYALOSIS

Asteroid hyalosis is small white opacities that float in the eye.  They uysually occur in one eye more than the other, as is the case with the picture below.  It occurs in humans, dogscats, and horses. Ocular asteroids are different from the more common typical vitreous floaters. The cause of asteroid hyalosis is unknown, but it has been associated with diabetes , high blood pressure, and high cholesterol. The asteroid bodies are made up of calcium and phospholipids.  While asteroid hyalosis is quite impressive, surprisingly most patients never notice them in their vision.  They cause no problems, but may interfere with visualization of the retina during eye exams. Treatment of asteroid hyalosis is unnecessary unless better visualization of the retina is needed, such as in cases of diabetic retinopathy.  


Wednesday, June 12, 2019

TREATED RETINAL HOLE

The image above is the treated hole with laser.  The image below is the original hole.