Yong Zheng Wai, Boon Nie Yeoh, Wai Seng Chiang, Muhammad Hazim Bin Sharum, Nurhayati Abdul Kadir, Nur Hafizah Binti Mat Jalil, Jessie Si Wai Ho, Nur Nabila Sarkawi, Siew Te Wong, Nadzariah Cheng Binti Abdullah
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Keratometry, biometry, and intraocular lens power calculation in Bornean sun bears (Helarctos malayanus euryspilus).
Background: Cataracts are a common ocular condition that affects captive sun bears, yet there is a lack of detailed case reports and ocular studies of this species.
Aim: The examinations aim to calculate the intraocular lens (IOL) power required to achieve emmetropia following cataract surgery.
Methods: Five Bornean sun bears diagnosed with cataracts at the Bornean Sun Bear Conservation Centre in Malaysia underwent ocular examination under general anesthesia. Keratometry and biometry data, including anterior chamber depth, crystalline lens thickness, and axial globe length, were collected using an automated keratometer and B-mode ultrasound. The Retzlaff, Binkhorst, Colenbrander, and Fyodorov formulas were used to estimate the required IOL power.
Results: The mean corneal keratometric power was 56.94 D, the mean axial globe length was 12.93 mm, and the mean calculated postoperative anterior chamber depth was 4.77 mm. The mean calculated IOL power was +92.96 D. Conclusion: Aphakic cataract surgery were decided following these findings showing no available commercial IOL implants for this species. These findings provide valuable baseline data for optimizing cataract surgery in Bornean sun bears.
期刊介绍：
Open Veterinary Journal is a peer-reviewed international open access online and printed journal that publishes high-quality original research articles. reviews, short communications and case reports dedicated to all aspects of veterinary sciences and its related subjects. Research areas include the following: Infectious diseases of zoonotic/food-borne importance, applied biochemistry, parasitology, endocrinology, microbiology, immunology, pathology, pharmacology, physiology, epidemiology, molecular biology, immunogenetics, surgery, ophthalmology, dermatology, oncology and animal reproduction. All papers are peer-reviewed. Moreover, with the presence of well-qualified group of international referees, the process of publication will be done meticulously and to the highest standards.
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