Surgical removal of cataract in an Asiatic black bear (<i>Ursus thibetanus</i>) by phacoemulsification and aspiration

Abstract

A twenty-year-old male Asiatic black bear (Ursus thibetanus) presented at the Rakuno Gakuen University Animal Medical Center with a 10-year history of bilateral blindness and cataracts. Surgical treatment of bilateral cataracts by extracapsular lensextraction using phacoemulsification and aspiration (PEA) was performed under general anesthesia. An anterior capsulectomy was performed using micro iris scissors and micro anterior lens capsule forceps. The cataract was removed with PEA using the two-handed technique. After surgery, systemic corticosteroids, anti-inflammatory drugs and antibiotics were administered. After cataract removal, the bear had recovered vision, and good quality vision has been maintained to date (15 months). PEA can be a safe and effective treatment for cataracts that impair vision in bears.

Analysis of the Effect of Phacoemulsification and Intraocular Lens Implantation Combined With Trabeculectomy on Cataract and Its Influence on Corneal Endothelium

“…The therapeutic principle of this technology is to establish surgical access in the incision of cornea or sclera through the phacoemulsification handle, then form a capsulorhexis, and use the ultrasonic needle to generate certain energy in the eyes, so as to crush the hard lens into chylous shape, and then suck out the crushed lens and free cortex with the help of perfusion suction system (11,12). This operation can deepen the anterior chamber, enlarge the angle of the chamber, improve the pupillary block caused by the lens, and solve the anatomical factors such as lens thickening, relative forward movement of the lens position, closure of the remaining angle of the chamber in cataract patients, thus rapidly reducing the IOP of the patients (13). During the implementation of PHACO, ultrasound itself can cause the secretion function of the ciliary body to decline, and the placement of viscoelastic agent forms a passive separation effect on the corner adhesion.…”

Bilateral cataract surgery in a Japanese macaque (Macaca fuscata): A case report

“…There have been many reports of cataract surgery in animals. [14][15][16][17][18][19][20][21][22][23] However, there are only a few reports on cataract surgery in non-human primates. To the best of the authors' knowledge, this is the first report of successful cataract surgery on a Japanese macaque.…”

“…Cataract is a disease that affects a wide variety of animals, causing vision loss. There have been many reports of cataract surgery in animals 14‐23 . However, there are only a few reports on cataract surgery in non‐human primates.…”