Friday, 16 June 2017

Electrocution causes star-shaped cataracts on man's eyes

Instead of seeing stars, an electrician who experienced a 14,000-volt electric shock

to the left shoulder came away with star-shaped cataracts stamped on both eyes, doctors

reported Jan. 23 in the New England Journal of Medicine.

A cataract is a clouding of the eye's lens, which is a structure that

helps focus light or an image. When the lens is clear, light passes through to

the eye's retina -- a tissue located at the back of the eye -- where the brain

processes the image. If the lens is cloudy due to cataracts, the result is

blurry vision.

Cataracts are commonly caused by aging, so common that more

than half of Americans have a cataract or undergo surgery to fix them by the

time they are 80 years old.

The male patient, 42, underwent cataract extraction surgery

four months after the electric shock, and also had an implant placed in to act

like a lens and focus light, what's called in intraocular lens. It improved his vision a bit, but he was still legally blind and could only count fingers out

of his left eye. He likely won't fully regain his sight because of damage to

the retina and optic nerve, the str ucture that transmits visual signals from

the retina to the brain.

New York City-based optometrist Dr. Justin Rapp, who had no

involvement in the man's case, explained to CBS News the electrical current may

have disrupted the chemical balance in the man's blood, which in turn decreased blood

flow to the optic nerves and parts of the retina, as evidenced by the whitish

cloud structures seen in the bottom half of the above photos.

This chemical disruption may also have impacted the fluid

around the lens, which contributed to the clouding effect, or cataract.

Often, cataracts have been known to form snowflake or

star-shaped patterns, Rapp pointed out, but he's never quite seen a case like this.

"This is a shockingly 'perfect' example of an stellate

(star-shaped) cataract," he said. "The fact that it goes NwtVKA completely 360 degrees

around the outer edge of the lens is definitely remarkable."

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