A Pittsburgh man claims in a lawsuit that a ride on the Raging Rapids at Kennywood left him with a parasite that “eats away at the cornea of the eye.” 
 
 The lawsuit filed this week by Robert Trostle and his wife, Krystsina, in Allegheny County Common Pleas Court claims he was splashed in the left eye by dirty water that contained a parasite known as microsporidia. Robert and Krystsina Trostle, of Squirrel Hill, were waiting in line July 2 when they noticed that the water surrounding the ride was "dirty, stagnant and sludge-like," the lawsuit said. “Additionally, the Trostles noticed the waterfall was not operating.” 
 
 Robert Trostle was splashed toward the end of the ride, “which is customary for those riding the Raging Rapids.” 
 
 The splash led the parasite to embed in Trostle's eye, according to the lawsuit, which alleges negligence against Kennywood Entertainment Inc. 
 
 His left eye became inflamed, and he was treated July 5 for acute conjunctivitis with antibiotics. He was diagnosed with acute conjunctivitis on July 5 and given antibiotics, but the symptoms got worse, and he was diagnosed with microsporidia keratitis on July 14, according to the lawsuit. “Robert had to undergo an extremely painful surgery where the parasite was scraped out of the eye with a surgical scalpel, and he was required to remain in a dark room for the next two days,” according to the lawsuit. “The microsporidia parasite penetrated the second level of Robert's eye and the entirety of the parasite was unable to be removed via surgery.” 
 
 He still suffers from inflammation, blurry vision, redness and pain, the lawsuit said. The Trostles, of Squirrel Hill, are represented by Pittsburgh attorney Alan Perer, who told the Tribune-Review Thursday that the Allegheny County Health Department took samples from the ride's water after the incident. At this time, the investigation is still ongoing, and no further information is available.” 
 
 Kennywood spokesman Nick Paradise said he could not comment on pending litigation. "In general, safety is Kennywood's top priority in everything we do, and that certainly extends to maintenance of the rides and water involved in rides," Paradise said.
– Its website proclaims Kennywood "Pittsburgh's best amusement park." Robert Trostle would likely append "for contracting an eye-eating parasite" to the end of that. That's what the Squirrel Hill man is claiming happened to him during a July 2 visit to the Pennsylvania park, per a negligence lawsuit filed Tuesday. It says Trostle and wife Krystsina opted to ride the Raging Rapids water ride, which is supposed to mimic a white-water rafting trip, even after noticing the ride's water was "dirty, stagnant and sludge-like" and its waterfall wasn't running. The ride typically splashes riders at the end, reports TribLive, and in Trostle's case, he said the water hit his left eye—and then the trouble allegedly began. Per the suit, the eye reddened, became sensitive to light, and itchy and painful, reports the Post-Gazette. He was initially diagnosed with acute conjunctivitis. Antibiotics didn't rectify the situation, and on July 14 he was diagnosed with microsporidia keratitis. The suit says microsporidia is a "harmful parasite that eats away at the cornea of the eye," and alleges it was in the ride's water. It's also still in Trostle's eye, he says: Though he underwent an "extremely painful" surgery that involved scraping the parasite out with a scalpel, he claims the parasite reached a "second level" of his eye where surgery can't reach it, leaving him with vision problems and discomfort. A rep for the park wouldn't comment on the suit directly but says, "Safety is the top priority of everything we do." WTAE reports Trostle is seeking at least $35,000 in damages. (This 18-year-old died after being exposed to an amoeba on a rafting trip.)