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Veterinary Ophthalmology

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https://www.readbyqxmd.com/read/29336116/the-retina-of-the-collared-peccary-pecari-tajacu-structure-and-function
#1
Raaya Ezra-Elia, Maya Ross, Nili Avni-Magen, Asaf Berkowitz, Ron Ofri
OBJECTIVE: To study retinal morphology and function in the collared peccary, an ungulate species distantly related to the domestic pig. ANIMAL STUDIES: Twenty captive peccaries anesthetized for routine health examinations. Procedures No abnormalities were noted on a complete ophthalmic examination. Fundi were examined ophthalmoscopically and photographed. The eyes of an individual that died of unrelated, nonocular reasons were studied histologically and by immunohistochemistry...
January 16, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29284193/epidemiology-of-ocular-disorders-presumed-to-be-inherited-in-three-small-italian-dog-breeds-in-italy
#2
Adolfo Guandalini, Nicola Di Girolamo, Roberta Corvi, Daniele Santillo, Valentina Andreani, Barbara Pinzo
OBJECTIVE: To describe the prevalence and the types of eye disorders that are known or presumed to be inherited (KP-HED) in three small Italian dog breeds. ANIMALS: Three small Italian dog breeds: Maltese, Bolognese, and Italian Greyhound. PROCEDURES: All dogs of the breeds selected for this prospective observational study that underwent a complete ophthalmic examination between 1994 and 2015 were included. General and proportional KP-HED prevalence with 95% confidence intervals were reported...
December 28, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29284192/clinical-signs-imaging-findings-and-outcome-in-twelve-cats-with-internal-ophthalmoparesis-ophthalmoplegia
#3
Negar Hamzianpour, Richard Lam, Roser Tetas, Elsa Beltran
OBJECTIVE: To retrospectively evaluate the clinical signs, imaging findings, and outcome of feline internal ophthalmoparesis/ophthalmoplegia. PROCEDURE: Medical records were reviewed from 2008 to 2015. Inclusion criteria included cats that presented with internal ophthalmoparesis/ophthalmoplegia, underwent diagnostic imaging, and had follow-up information available. RESULTS: Twelve cases of feline internal ophthalmoparesis/ophthalmoplegia were identified...
December 28, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29277087/in-vivo-confocal-microscopy-for-detection-of-subconjunctival-onchocerca-lupi-infection-in-a-dog
#4
Michele L Edelmann, Mason Jager, Filipe Espinheira, Eric C Ledbetter
A seven-year-old male castrated mixed-breed dog was diagnosed with bilateral subconjunctival masses. In vivo confocal microscopy facilitated visualization of Onchocerca lupi adult nematodes and their characteristic cuticular morphology. Long, thin, white nematodes were extracted during excisional biopsy. Histopathologic and parasitologic evaluation confirmed the diagnosis of O. lupi. In addition to surgical debulking of the parasitic granulomas, the dog received systemic doxycycline, prednisone, and ivermectin therapy...
December 25, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29266715/cryopreservation-20%C3%A2-%C3%A2-c-of-canine-corneoscleral-tissue-histological-microbiological-and-ultrastructural-study
#5
Daniel Costa, Marta Leiva, Carolina Naranjo, José Ríos, Maria T Peña
OBJECTIVE: To evaluate microbiological, histological, and ultrastructural characteristics of short-term cryopreserved (STC) canine corneoscleral tissue (<1 year) and to compare it with long-term cryopreserved (LTC) tissue (>6 years). ANIMALS STUDIED: Thirty-six healthy canine globes. PROCEDURE: After a decontamination protocol, globes were enucleated and stored at -20 °C. Corneoscleral tissue was evaluated at different periods: <1 year (20 eyes) and >6 years (12 eyes)...
December 20, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29251408/odontogenic-parakeratinized-cyst-resulting-in-exophthalmos-and-palatine-maxillary-and-zygomatic-bone-erosion-in-a-dog
#6
Vanessa L Holly, Lesley A Zwicker, Gregory Starrak, Marina L Leis, Bianca S Bauer, Stephanie Osinchuk, Lynne S Sandmeyer, Bruce H Grahn
A novel case of a canine odontogenic parakeratinized cyst (COPC) that resulted in exophthalmos and palatine, maxillary, and zygomatic bone erosion in a 5-year-old Chihuahua dog is reported. Final diagnosis was aided by cross-sectional imaging (magnetic resonance imaging and computed tomography) and confirmed with histologic examination of the cyst wall.
December 18, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29251403/rebamipide-suppresses-tnf-%C3%AE-production-and-macrophage-infiltration-in-the-conjunctiva
#7
Kazuki Tajima, Takaaki Hattori, Hiroki Takahashi, Haruki Katahira, Akitomo Narimatsu, Shigeto Kumakura, Hiroshi Goto
PURPOSE: To evaluate the anti-inflammatory effect of rebamipide during corneal epithelial wound healing using a mouse wound repair model. METHODS: A 2-mm circular disc of the central cornea was demarcated in the right eye of C57BL/6 mice and the epithelium removed. Rebamipide 2% eyedrop was instilled onto the wounded eye 5 times a day (n = 26). Phosphate-buffered saline (PBS) was used in the control group (n = 26). Corneal and conjunctival IL-1β and TNF-α levels were measured at 6 h and 24 h postinjury by ELISA...
December 18, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29251400/ophthalmic-examination-findings-and-intraocular-pressures-in-wild-caught-african-giant-pouched-rats-cricetomys-spp
#8
Amanda R Heller, Eric C Ledbetter, Bhupinder Singh, Danielle N Lee, Alexander G Ophir
PURPOSE: To report ophthalmic examination findings and intraocular pressures (IOPs) in wild-caught African giant pouched rats (Cricetomys ansorgei and gambianus) from Tanzania and Ghana. PROCEDURES: After being placed under general anesthesia for examination, slit-lamp biomicroscopy before and after pharmacologic mydriasis and indirect ophthalmoscopy was performed. Eyes were fluorescein stained and IOPs measured by rebound tonometry using the TonoVet® . RESULTS: Thirty-two sexually mature pouched rats (64 eyes) were examined, including 16 males and 16 females...
December 18, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29251394/optic-neuritis-in-dogs-96-cases-1983-2016
#9
Sara M Smith, Hans D Westermeyer, Christopher L Mariani, Brian C Gilger, Michael G Davidson
OBJECTIVE: To characterize ocular and neurologic findings, causes, and treatment outcomes of dogs with optic neuritis. PROCEDURE: Medical records from dogs with a diagnosis of optic neuritis at North Carolina State University, College of Veterinary Medicine, Veterinary Hospital between 1983 and 2016 were reviewed. RESULTS: Ninety-six cases (20 unilateral, 76 bilateral), comprised of 38 males and 58 females with a mean age of 6.1 ± 3.0 years (range 0...
December 18, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29251393/an-investigation-into-the-bacterial-contamination-of-goniolenses-in-use-in-clinical-practice
#10
Rachael Grundon, Emma Scurrell, John Mould, Emma Hayton-Lee, Christine Heinrich
Objectives To report the incidence and evaluate the clinical significance of goniolens bacterial contamination in clinical use in dogs with three different usage protocols and one with an added cleaning protocol. Animals Studied and Methods Three groups of twenty dogs undergoing gonioscopy at a private practice in the UK had the goniolenses swabbed for bacteriology culture and identification prior to placement on the cornea. Three protocols of lens use, with 2 different types of goniolens, were studied. One protocol was then repeated with 21 dogs with a lens cleaning protocol prior to storage...
December 18, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29232036/diurnal-variations-in-intraocular-pressure-and-central-corneal-thickness-and-the-correlation-between-these-factors-in-dogs
#11
Alicia Garzón-Ariza, Alicia Guisado, Alba Galán, Eva Martín-Suárez
OBJECTIVE: To study the diurnal variation in intraocular pressure (IOP) and central corneal thickness (CCT) in healthy Beagles by rebound tonometry and ultrasonic pachymetry, respectively, in addition to determining whether a correlation exists between these two variables. ANIMALS STUDIED: Twenty eyes from 10 healthy Beagle dogs were included in the study. PROCEDURES: The IOP and CCT were measured by rebound tonometry and ultrasonic pachymetry, respectively, at 2-h intervals over an 8-hour period between 10:00 and 18:00...
December 12, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29232029/the-effects-of-subconjunctival-bupivacaine-lidocaine-and-mepivacaine-on-corneal-sensitivity-in-healthy-horses
#12
Maggie R Jinks, Robin L Fontenot, Robert W Wills, Caroline M Betbeze
OBJECTIVE: To compare the efficacy and duration of effect of three local anesthetics on corneal sensitivity when administered subconjunctivally in horses. ANIMALS STUDIED: Eight healthy adult horses. PROCEDURE: A randomized, masked, crossover study design was used, with a two-week washout period between trials. The subconjunctival space of the randomly selected eye was injected with 0.2 mLs of bupivacaine (0.5%), lidocaine (2%), mepivacaine (2%), or saline...
December 12, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29205744/rabbits-with-naturally-occurring-cataracts-referred-for-phacoemulsification-and-intraocular-lens-implantation-a-preliminary-study-of-12-cases
#13
Rick F Sanchez, Richard Everson, Joanna Hedley, Charlotte Dawson, Richard Lam, Simon L Priestnall, Alejandra Garcia de Carellan, Cristina de Miguel, Christopher Seymour
OBJECTIVE: To describe the presentation of 15 rabbits with naturally occurring cataracts referred for phacoemulsification surgery, the procedure in 13 cases and the follow-up in 12. ANIMALS INCLUDED: Fifteen rabbits (30 eyes), nine of which stopped following visual cues in association with cataract progression. MATERIALS AND METHODS: Rabbits underwent preoperative ophthalmic and ocular ultrasound examination. RESULTS: Thirteen rabbits (22 eyes) had mature cataracts...
December 4, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29159852/orbital-invasive-squamous-cell-carcinoma-with-adnexal-involvement-clinically-mimicking-feline-restrictive-orbital-myofibroblastic-sarcoma-19-cases-1990-2016
#14
Kathryn A Diehl, Silvia G Pryor, Leandro Bc Teixeira
OBJECTIVE: To describe the clinical presentations of patients diagnosed with ocular adnexal or orbital squamous cell carcinoma (SCC), which possess features similar to feline restrictive orbital myofibroblastic sarcoma (FROMS). PROCEDURES: A retrospective review of adnexal and/or orbital SCC was performed. Cases were collected from the University of Georgia College of Veterinary Medicine and the Comparative Ocular Pathology Laboratory of Wisconsin (COPLOW) (1990-2016)...
November 21, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29148158/long-term-anesthetic-protocol-in-rats-feasibility-in-electrophysiology-studies-in-visual-prosthesis
#15
Alejandro Barriga-Rivera, Veronica Tatarinoff, Nigel H Lovell, John W Morley, Gregg J Suaning
Electrical stimulation of excitable cells provides therapeutic benefits for a variety of medical conditions, including restoration of partial vision to those blinded via some types of retinal degeneration. To improve visual percepts elicited by the current technology, researchers are conducting acute electrophysiology experiments, mainly in cats. However, the rat can provide a model of a range of retinal diseases and possesses a sufficiently large eye to be used in this field. This article presents a long-term anesthetic protocol to enable electrophysiology experiments to further the development of visual prostheses...
November 17, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29111617/ocular-and-periocular-hemangiosarcoma-in-six-horses
#16
REVIEW
Nicole M Scherrer, Mary Lassaline, Julie Engiles
OBJECTIVE: To determine the characteristics of and prognosis for ocular and periocular hemangiosarcoma in horses. ANIMAL STUDIED: Six horses treated for ocular or periocular hemangiosarcoma. PROCEDURE: A retrospective review of medical records from 2007 to 2015 was performed to identify horses with a histologic diagnosis of ocular or periocular hemangiosarcoma. Signalment (age, sex, breed), duration of clinical signs, prior treatment, tumor size and location, medical and surgical treatment including postoperative chemotherapy, follow-up time, and outcome were obtained from medical records...
November 7, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29111598/comparison-of-corneal-thickness-measurements-using-ultrasound-pachymetry-ultrasound-biomicroscopy-and-digital-caliper-in-frozen-canine-corneas
#17
Seowoo Jeong, Seonmi Kang, Sangwan Park, Eunjin Park, Jaegook Lim, Taekjin Nam, Kangmoon Seo
OBJECTIVE: To evaluate the clinical efficacy among ultrasound pachymetry (UP), ultrasound biomicroscopy (UBM), and manual measurement (MM) with digital caliper by comparing corneal thickness (COT) values obtained from frozen canine corneas ex vivo. PROCEDURES: COT was measured using UP, UBM, and MM in eight enucleated normal canine eyes frozen at -20 °C for 4 weeks. After thawing at room temperature for 2 h, the COT values were obtained from five sites on each cornea: central corneal thickness (CCOT), thickness at the 3, 6, 9, and 12 o'clock positions (3COT, 6COT, 9COT, and 12COT, respectively)...
November 7, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29111596/compliance-between-clinical-and-genetic-diagnosis-of-choroidal-hypoplasia-in-103-norwegian-border-collie-puppies
#18
Siv Grosås, Frode Lingaas, Kristin Wear Prestrud, Ernst-Otto Ropstad
OBJECTIVE: To describe the frequency of the nonhomologous end-joining factor 1 (NHEJ1) mutation and the compliance between clinical and genetic diagnosis of choroidal hypoplasia (CH) in a group of Norwegian Border Collies. ANIMALS STUDIED: Border collie puppies in the age from 5 to 8 weeks. MATERIAL AND METHODS: Puppies included in the study had a complete ophthalmological examination. All findings were recorded, and an ECVO scheme form was issued for each puppy...
November 7, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29111586/an-unusual-case-of-feline-acute-corneal-hydrops-atypical-disease-presentation-and-possible-in%C3%A2-vivo-detection-of-descemet-s-membrane-detachment-in-the-cat-s-unaffected-eye
#19
Brittany N Schlesener, Erin M Scott, Lucien V Vallone
A 1-year-old, female spayed, domestic shorthair cat presented for blepharospasm of the right eye. Slit-lamp biomicroscopic examination showed focal corneal ulceration and presumptive keratomalacia of the right eye. Examination of the left eye was normal apart from a focal endothelial opacity. Within the first 24 h of medical management, the right eye developed marked corneal edema and globular anterior protrusion of the corneal surface consistent with feline acute corneal hydrops (FACH). Surgical management consisted of a bridge conjunctival graft, nictitating membrane flap, and temporary tarsorrhaphy...
November 7, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29111585/tear-ferning-test-in-healthy-dogs
#20
Arianne P Oriá, Ana Claudia S Raposo, Nayone L L C Araújo, Felipe B Lima, Ali M Masmali
PURPOSE: To evaluate and compare three tear sampling methods using two grading scales for administering the tear ferning test (TFT) to healthy dogs. METHODS: In total, 90 dogs (180 eyes) were subjected to tear sampling using millimetered strips, reused after the Schirmer tear test (STT) (Schirmer group, SG). Then, the dogs were subdivided into three groups according to sampling approach: micropipette (MPG), microcapillary (MCG), and Schirmer sample 2 (S2G). The collected tears were dried on a clean microscope glass slide at room temperature and humidity...
November 7, 2017: Veterinary Ophthalmology
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