Bilateral phacoemulsification in an orangutan (Pongo pygmaeus)

Area of Science:

• Veterinary Ophthalmology
• Primate Medicine
• Conservation Medicine

Background:

• Cataracts pose a significant threat to vision in various animal species, including primates.
• Captive-born orangutans (Pongo pygmaeus) are a critically endangered species, making any health intervention crucial for their survival.
• Ophthalmic conditions in non-human primates can be challenging to diagnose and treat due to species-specific differences.

Observation:

• A 14-year-old, female, captive-born orangutan presented with bilateral cataracts, impairing vision.
• Diagnostic ophthalmic examinations, including ultrasonography and electroretinography, were performed to assess the extent of the condition.
• The orangutan exhibited reduced vision and activity levels consistent with cataracts.

Findings:

• Bilateral cataract correction was successfully performed using phacoemulsification, a specialized surgical technique.
• Post-operative recovery demonstrated a significant improvement in the orangutan's visual function.
• The animal regained normal activity levels following the successful vision restoration surgery.

Implications:

• This case report highlights the feasibility and success of advanced ophthalmic surgical techniques in orangutans.
• Successful vision restoration can improve the quality of life and well-being of individual animals in captive conservation programs.
• The described procedures may serve as a valuable reference for managing similar ophthalmic conditions in other endangered primate species, aiding conservation efforts.