title: Air assisted lamellar keratectomy for the corneal haze model.
abstract: To standardize the corneal haze model in the resection depth and size for efficient corneal haze development, air assisted lamellar keratectomy was performed. The ex vivo porcine corneas were categorized into four groups depending on the trephined depth: 250 µm (G1), 375 µm (G2), 500 µm(G3) and 750 µm (G4). The stroma was equally ablated at the five measurement sites in all groups. Significant differences were observed between the trephined corneal depths for resection and ablated corneal thickness in G1 (p < 0.001). No significant differences were observed between the trephined corneal depth for resection and the ablated corneal thickness in G2, G3, and G4. The resection percentage was similar in all groups after microscopic imaging of corneal sections. Air assisted lamellar keratectomy (AK) and conventional keratectomy (CK) method were applied to six beagles, after which development of corneal haze was evaluated weekly until postoperative day 28. The occurrence of corneal haze in the AK group was significantly higher than that in the CK group beginning 14 days after surgery. Alpha-smooth muscle actin expression was significantly higher in the AK group (p < 0.001) than the CK group. Air assisted lamellar keratectomy was used to achieve the desired corneal thickness after resection and produce sufficient corneal haze.
authors: Department of Veterinary Clinical Science, College of Veterinary Medicine, Seoul National University, Seoul 151-742, Korea.
authors: Soohyun
authors: S
authors: Kim
authors: Young Woo
authors: YW
authors: Park
authors: Euiri
authors: E
authors: Lee
authors: Sang Wan
authors: SW
authors: Park
authors: Sungwon
authors: S
authors: Park
authors: Jong Whi
authors: JW
authors: Kim
authors: Je Kyung
authors: JK
authors: Seong
authors: Kangmoon
authors: K
authors: Seo
mesh_terms: D000818:Animals; D003315:Cornea / Q000601:surgery*; D003318:Corneal Opacity / Q000209:etiology / Q000601:surgery*; D004195:Disease Models, Animal; D004285:Dogs; D006801:Humans; D013508:Ophthalmologic Surgical Procedures / Q000379:methods*; D034421:Sus scrofa; D014945:Wound Healing
keywords: ablated corneal depth; air assisted lamellar keratectomy; canine eye; corneal haze; porcine eye