Phacoemulsification and +14 diopter intraocular lens placement in a Saddlebred foal.
Abstract: A 2-month-old, 110-kg Saddlebred filly presented for evaluation of bilateral cataracts. A hypermature cataract in the left eye (OS) and an incipient nuclear cataract in the right eye (OD) were diagnosed. Electroretinography and ocular ultrasound revealed no contraindications for surgical removal of the cataractous lens OS. Phacoemulsification and implantation of a +14 diopter (D) intraocular lens (IOL) OS were performed at 4 months of age without complication, with the exception of a partial iridectomy performed on a small iris section that prolapsed through the corneal incision. Complete ophthalmic examinations, including ocular ultrasound and streak retinoscopy, were performed 1, 2, 6 weeks, 4 months, 1, and 2 years postoperatively. Diffuse corneal edema and a superficial corneal ulcer developed OS during the early postoperative period and resolved without complication. Dyscoria was identified owing to anterior synechia of the dorsomedial iris at the incision site. Two years after surgery, menace response, palpebral reflex, dazzle reflex, and pupillary light reflexes were present in both eyes (OU). The IOL remained centrally positioned within the capsule, with mild anterior tilting of the superior portion of the IOL and mild fibrosis of the lens capsule. The postoperative net refractive error was +0.31 D OS. Based on this report, a +14 D IOL may be the appropriate choice following lens extraction in a foal to achieve refraction near emmetropia at maturity. To our knowledge, this is the first report of phacoemulsification and IOL implantation in a foal with long-term follow-up.
© 2012 American College of Veterinary Ophthalmologists.
Publication Date: 2012-05-29 PubMed ID: 22640484DOI: 10.1111/j.1463-5224.2012.01032.xGoogle Scholar: Lookup
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Summary
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The research article presents a case study of a surgical procedure performed on a 2-month-old Saddlebred filly diagnosed with bilateral cataracts. Phacoemulsification and the implantation of a +14 diopter intraocular lens in the left eye were successfully carried out, providing valuable insights for similar cases in veterinary medicine.
Objective and Presentation of the Case
- The main aim of this research was to explore the feasibility and analyze the results of phacoemulsification and intraocular lens implantation in a juvenile Saddlebred filly diagnosed with cataracts in both eyes.
- The filly presented hypermature cataract in the left eye and an incipient nuclear cataract in the right eye. Preliminary tests, including electroretinography and ocular ultrasound, showed no surgical contraindications for lens removal in the left eye.
Surgical Procedure and Post-surgical Observations
- The surgical procedure of phacoemulsification and implantation of a +14 diopter intraocular lens was performed when the Saddlebred filly was 4 months old. The surgery comprised an additional step of a partial iridectomy due to a small portion of the iris prolapsing through the corneal incision.
- Follow-up ophthalmic examinations were carried out 1, 2, 6 weeks, 4 months, 1, and 2 years postoperatively. Early postoperative complications included the development of diffuse corneal edema and a superficial corneal ulcer in the left eye, but both these conditions resolved successfully.
Long-term Postoperative Outcomes
- Two years after the procedure, the filly showed positive menace response, palpebral reflex, dazzle reflex, and pupillary light reflexes in both eyes. These responses demonstrated that the filly’s vision and eye reflexes were normal.
- The intraocular lens implant remained centrally located within the capsule. However, a slight anterior tilt of the superior portion of the lens and mild fibrosis of the lens capsule were observed.
- The postoperative net refractive error was +0.31 D in the left eye, signifying a near-normal vision in the surgically treated eye.
Conclusion and Future Recommendations
- The study concluded that a +14 D intraocular lens could potentially be a suitable choice for lens extraction in a juvenile foal to achieve near emmetropic vision at maturity – which is close to perfect vision.
- In addition to providing a clearer understanding of the surgical procedure of phacoemulsification and intraocular lens implant in a foal, this research is noteworthy for being the first such case report with a long-term follow-up.
Cite This Article
APA
Harrington JT, McMullen RJ, Clode AB, Gilger BC.
(2012).
Phacoemulsification and +14 diopter intraocular lens placement in a Saddlebred foal.
Vet Ophthalmol, 16(2), 140-148.
https://doi.org/10.1111/j.1463-5224.2012.01032.x Publication
Researcher Affiliations
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27606, USA.
MeSH Terms
- Animals
- Cataract / pathology
- Cataract / therapy
- Cataract / veterinary
- Cataract Extraction / methods
- Cataract Extraction / veterinary
- Female
- Horse Diseases / surgery
- Horse Diseases / therapy
- Horses
- Lens Implantation, Intraocular / veterinary
- Phacoemulsification / veterinary
Citations
This article has been cited 1 times.- Meister U, Görig C, Murphy CJ, Haan H, Ohnesorge B, Boevé MH. Intraocular lens power calculation for the equine eye. BMC Vet Res 2018 Apr 3;14(1):123.
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