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Veterinary Ophthalmology

Doris Wu, Sara M Smith, Jessica M Stine, Tammy M Michau, Thomas R Miller, Samantha L Pederson, Kate S Freeman
OBJECTIVE: To evaluate the efficacy of diamond burr debridement (DBD) vs a combination of diamond burr debridement with superficial grid keratotomy (DBD+SGK) for the treatment of spontaneous chronic corneal epithelial defects (SCCEDs) in dogs. PROCEDURE: Medical records of dogs diagnosed with SCCEDs from three different institutions that received a DBD or DBD+SGK between 2003 and 2015 were reviewed. Age, breed, sex, history of a previous SCCED, procedures performed, time to healing, and complications were statistically analyzed...
March 14, 2018: Veterinary Ophthalmology
Anne-Sophie Poinsard, Iona Mathieson, Olivier Balland
OBJECTIVE: The aim of our work was to study the potential of tarsomarginal grafting technique, in canine. ANIMAL STUDIED: All dogs included in this study had tumors of the upper or lower eyelid. Furthermore, resection of the tumor necessitated excision of the eyelid margin comprising 1/4 and 2/3. PROCEDURE: Harvesting of the graft with the length of half the length of the tumor, including its free margins was performed via a full-thickness incision on the ipsilateral healthy eyelid...
March 13, 2018: Veterinary Ophthalmology
Sunghwa Hong, Seungjo Park, Dahae Lee, Ahyoung Cha, Dongeun Kim, Jihye Choi
OBJECTIVE: This study was performed to evaluate ocular structures using contrast-enhanced ultrasonography (CEUS) in dogs to assess the feasibility of CEUS for investigating the blood perfusion of canine eyes. ANIMAL STUDIED: Eight purpose-bred beagles were used. PROCEDURES: Blood perfusion and vascularity of the right eye were evaluated using color Doppler, power Doppler, and CEUS with Sonazoid® . Vascular changes were quantitatively evaluated by measuring peak intensity, time to initial upslope, and time to peak from the ciliary body, iris, choroid, retina, and the retrobulbar region by CEUS...
March 9, 2018: Veterinary Ophthalmology
Jessica E McDonald, Amy M Knollinger
PURPOSE: To evaluate the use of hyaluronic acid (HA) subdermal filler in canines and felines for entropion. METHODS: Complete ophthalmologic examination was performed by a board-certified veterinary ophthalmologist or ABVO-approved resident. Each case was characterized as primary, secondary, spastic or cicatricial entropion. HA subdermal filler, specifically Restylane® and Restylane Silk® , were utilized in dogs and cats, respectively. Subdermal injection was performed 1-2 mm from the eyelid margin in the affected area until normal eyelid conformation was achieved...
March 9, 2018: Veterinary Ophthalmology
Lawrence Crossfield, Luca Fortuna, Rebekah Carling, Emma Scurrell, Marian Matas Riera, Yu-Mei Chang, Charlotte Dawson, Rachael Pittaway, Ian Yl Yeung, Caroline Thaung, Simon L Priestnall, Oliver A Garden
OBJECTIVE: To characterize the immune cells present in different forms of feline anterior uveitis. SAMPLES: Eyes were obtained from 49 cats diagnosed with chronic idiopathic lymphoplasmacytic anterior uveitis, 7 cats with feline infectious peritonitis (FIP), and 9 cats euthanized for nonocular disease. METHODS: H&E sections were scored on the level of infiltrate in the anterior uvea. Immunohistochemistry was performed for FoxP3, CD3, and IL-17A, and positive cells were quantified in multiple images of each sample...
March 8, 2018: Veterinary Ophthalmology
Carla D Hibbs, Paul M Barrett, D Dustin Dees
PURPOSE: To determine intraocular pressure (IOP) reference intervals in eyes of healthy miniature donkeys (Equus africanus asinus) via rebound and applanation tonometry. METHODS: Complete ophthalmic and physical examinations were performed by board-certified veterinary ophthalmologists. Inclusion criteria for animals participating in this study were dictated by the American Society for Veterinary Clinical Pathology (ASVCP) reference interval guidelines. Intraocular pressure estimates (TonoVet® and TonoPen XL® ) were obtained in both eyes...
March 8, 2018: Veterinary Ophthalmology
Elizabeth A F Schaefer, Rebecca E H Whiting, Jacqueline W Pearce, Bruce H Grahn, Charles W Hamm, Cecil P Moore, Kristina L Narfström
A 11-year-old neutered male Labrador retriever-cross dog was presented to the University of Missouri-Columbia Veterinary Ophthalmology Service for subtle visual deficits. Indirect ophthalmoscopy revealed a smooth, bullous elevation in the superior-temporal retina OU. Optical coherence tomography (OCT) performed OU showed inner retinal separation consistent with retinoschisis. Electroretinography (ERG) revealed markedly reduced b-wave amplitudes in the more severely affected eye (OD) compared with the less severely affected eye (OS)...
March 8, 2018: Veterinary Ophthalmology
Kelly E Knickelbein, Mallory Stock, Sebastian E Carrasco, Christopher M Reilly, Mary E Lassaline
An 18-year-old American Miniature Horse mare was presented with a complaint of a scleral swelling affecting the right eye and a history of suspected trauma 6 weeks prior to evaluation. Clinical findings included severe blepharospasm, a bulbous swelling of the dorsotemporal bulbar conjunctiva, and phthisis bulbi. Ocular ultrasound was recommended but declined. Enucleation was elected for the blind, painful eye and was performed standing. Gross and histopathologic examinations of the globe were consistent with extrusion of the lens to the episcleral space, which is classified as a traumatic phacocele when associated with naturally occurring trauma...
March 8, 2018: Veterinary Ophthalmology
Mary R Telle, Nickolas Chen, Daniel Shinsako, Julie A Kiland, Kazuya Oikawa, Ralph Møller Trane, Gillian J McLellan
OBJECTIVE: To determine the effect of feline congenital glaucoma (FCG) on corneal sensitivity, and relationships between corneal sensitivity, central corneal thickness (CT), and corneal diameter (CD). ANIMALS AND PROCEDURES: Corneal sensitivity (estimated by corneal touch threshold [CTT] using Cochet-Bonnet esthesiometry); CT using ultrasonic pachymetry; intraocular pressure (IOP) using rebound tonometry; and maximal horizontal CD were measured in 16 normal and 14 FCG cats, both males and females, aged 7 months-3...
March 8, 2018: Veterinary Ophthalmology
Alexandre Guyonnet, Elise Donzel, Aurélie Bourguet, Sabine Chahory
OBJECTIVE: To describe the epidemiology and the clinical presentation of cataracts in a population of cats in France. PROCEDURES: A review of medical records of cats presented to the Ophthalmology Unit of the National Veterinary School of Alfort between January 2010 and June 2017 was carried out to identify cats affected by cataracts. The signalment of affected cats, medical history, etiology of cataract, age of onset, stage of development, location of opacities, and concurrent ocular lesions were evaluated...
March 6, 2018: Veterinary Ophthalmology
Kelli L Zimmerman, Shelby L Reinstein
OBJECTIVE: To describe a successful, simple treatment for canine distichiasis. ANIMALS STUDIED: Client-owned dogs presenting to Veterinary Specialty and Emergency Center, Levittown, Pennsylvania. PROCEDURE: Retrospective analysis of medical records for canine patients that underwent transconjunctival thermal electrocautery treatment (TCEC) for distichiasis alone or with concurrent eyelid surgery between 2013 and 2016. Fifty eyes of 26 dogs (n = 88 eyelids) were included in the study...
March 1, 2018: Veterinary Ophthalmology
Kelly E Knickelbein, David J Maggs, Christopher M Reilly, Kathryn L Good, Juliet R Gionfriddo
OBJECTIVE: To describe the clinical, gross pathologic, and histopathologic findings for a visually impaired 5.8-year-old female alpaca with multiple ocular abnormalities, as well as the clinical findings for three closely related alpacas. ANIMALS STUDIED: Four alpacas. PROCEDURES: Ophthalmic examination was performed on a 16-month-old female alpaca following observation of visual impairment while hospitalized for an unrelated illness. Following acute systemic decline and death 4...
March 1, 2018: Veterinary Ophthalmology
Daniela Moura Dos Santos, Marcela Aldrovani, Marcella Rosa Filezio, Thais Guimarães Morato Abreu, Camila Pinho Balthazar da Silveira, Nathan Rocha das Neves Cruz, José Luiz Laus
OBJECTIVE: To study parameters related to nuclear morphology and chromatin remodeling in epithelial cells and lymphocytes from the inferior palpebral conjunctiva of dogs with and without keratoconjunctivitis sicca (KCS). ANIMALS STUDIED: Thirty-two dogs (64 eyes) were included in the study. Based on the tear production measured by Schirmer tear test 1, the dogs were distributed into control and KCS groups. PROCEDURES: Epithelial cells and lymphocytes were collected by conjunctival brush cytology, fixed on glass slides, and subjected to the Feulgen reaction, a topochemical method specific for DNA/chromatin...
March 1, 2018: Veterinary Ophthalmology
Louise O'Leary, Andrew Specht, Natalie Isaza, Maria Kallberg, Kathleen Barrie, Deborah Cottrell, Caryn Plummer
An approximately 2-year-old female Doberman Pinscher was referred for the evaluation of bilateral, chronic proliferative conjunctivitis. Ophthalmic examination revealed bilateral thick, opaque pseudomembranes originating from the conjunctivae that prevented visualization of the cornea and interior structures of the eye. Histopathological findings of biopsies of the pseudomembranes were consistent with ligneous conjunctivitis. Serum plasminogen activity levels were within the normal range. Treatment with topical and systemic anti-inflammatory and immunosuppressive drugs did not improve the conjunctival lesions...
February 26, 2018: Veterinary Ophthalmology
Bret A Moore, David J Maggs, Soohyun Kim, Monica J Motta, Ruta Bandivadekar, Lisa A Tell, Christopher J Murphy
OBJECTIVE: To estimate the prevalence of ocular disease and obtain normative ocular data for free-living hummingbirds. ANIMALS STUDIED: Two hundred and sixty-three free-living, adult Hummingbirds from coastal and inland central California were studied, including Anna's (Calypte anna, n = 186) and Black-chinned (Archilochus alexandri; n = 77) hummingbirds. PROCEDURES: Slit lamp biomicroscopy and indirect ophthalmoscopy were performed on all individuals...
February 20, 2018: Veterinary Ophthalmology
Susan S Lee, James Burke, Jie Shen, Alexandra Almazan, Werhner Orilla, Patrick Hughes, Jane Zhang, Huajiang Li, Craig Struble, Paul E Miller, Michael R Robinson
OBJECTIVE: To determine the effect of a bimatoprost sustained-release intracameral implant (Bimatoprost SR) on episcleral venous pressure (EVP) in normal dogs. METHODS: Normotensive beagle dogs were randomized to receive Bimatoprost SR 30 μg (n = 7) or sham injection (needle insertion only, n = 7) in one eye on day 1. EVP was measured with an episcleral venomanometer through day 65. Episcleral aqueous outflow vessels were identified using fluorescence imaging following intracameral injection of indocyanine green in one additional animal...
February 19, 2018: Veterinary Ophthalmology
Kellam D Bayley, R A Read
OBJECTIVE: To test a sub-Tenon's anesthesia technique in dogs as an alternative to systemic neuromuscular blockade to aid in canine cataract surgery under general anesthesia. PROCEDURES: A prospective controlled clinical study was performed involving 12 dogs undergoing bilateral cataract surgery under general anesthesia. One eye was randomly assigned to have phacoemulsification and prosthetic lens implantation performed with sub-Tenon's anesthesia (STA), and the control eye had surgery performed with systemic neuromuscular blockade (NMB)...
February 6, 2018: Veterinary Ophthalmology
Barbara Katharina Braus, Daniela Riedler, Alexander Tichy, Joachim Spergser, Ilse Schwendenwein
OBJECTIVE: To compare two types of bandage contact lenses on the healthy canine eye. ANIMALS STUDIED: Six healthy Beagles. PROCEDURES: Two different types of bandage contact lenses (single sized human silicone contact lens 'PureVision 2' (Bausch & Lomb Incorporated, Rochester, NY, USA) and specially designed veterinary hydrogel contact lens 'AcriVet Pat D' (Bausch & Lomb Incorporated) were placed in 12 eyes of healthy Beagle dogs. Retention times and the effects of the lenses regarding irritation of the eye, changes in tear production, impact of contact lenses on tonometric readings, and cytologic and microbiological alterations of the canine eye were investigated...
February 6, 2018: Veterinary Ophthalmology
Melanie L Church, Daniel R Priehs, Heidi Denis, Lara Croft, Stacy DiRocco, Michelle Davis
OBJECTIVE: To describe surgical technique, postoperative complications, and visual outcome in penguins after phacoemulsification lens extraction surgery. ANIMALS STUDIED: Twenty-one penguins (27 eyes) that had phacoemulsification from 2011 to 2015 at Animal Eye Associates. Species included are as follows: 14 southern Rockhopper (18 eyes, 66.6%), 4 Gentoo (4 eyes, 19%), 2 King (3 eyes, 9.5%), and 1 Chinstrap penguin (2 eyes, 4.8%). Eleven of the penguins were females, and 10 were males with average age at the time of surgery being 27...
February 6, 2018: Veterinary Ophthalmology
Jeffrey H Plochocki, Tamar Segev, Wade Grow, Margaret I Hall
OBJECTIVE: A complete and accurate understanding of extraocular muscle function is important to the veterinary care of the avian eye. This is especially true for birds of prey, which rely heavily on vision for survival and yet are prone to ocular injury and disease. To better understand the function of extraocular muscles in birds of prey, we studied extraocular muscle architecture grossly and histologically. ANIMALS STUDIED: This sample was composed of two each of the following species: red-tailed hawk (Buteo jamaicensis), Harris's hawk (Parabuteo unicinctus), great horned owl (Bubo virginianus), and barn owl (Tyto alba)...
February 6, 2018: Veterinary Ophthalmology
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