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Summary: Background: The Caspian miniature horse (CMH) is a small horse breed, which has not previously been evaluated for ophthalmic diseases. Objectives: The purpose of this study was to describe the ocular findings and to declare the normal ocular parameters seen in a small herd of CMH. Study design: Cross‐sectional study. Methods: Forty‐five Caspian miniature horses (25 mares and 20 stallions) were examined. Complete ophthalmic examination, commensal ocular surface microbiota culture and measurement of the horizontal and vertical fissure length were performed. Results: Mean ± SD age of horses was 52.0 ± 33.9 months (range: 12–122 months). Nine different ocular disorders were observed: dacryocystitis, conjunctivitis, linear keratopathy, Haab's striae, corpora nigra atrophy, iris hyperpigmentation, cataract, peripapillary butterfly inactive lesions and inactive choroiditis were detected. In total, 17 eyes (18.8%) of 12 horses (26.2%) had ocular related lesions. Two horses (4%) had more than one ocular lesion; the lesions were consistent with a diagnosis of either traumatic or recurrent uveitis. No vision loss was detected in these horses despite the identified ocular disorders. Main limitations: Limited number of studied animals. Conclusions: This study reported ocular findings in a small herd of CMH. A minority of horses in the herd had ocular lesions suggesting a history of glaucoma and/or equine recurrent uveitis. [ABSTRACT FROM AUTHOR]

Objective: To describe ophthalmic examination and diagnostic values for Schirmer tear test (STT), intraocular pressure (IOP), corneal horizontal diameter (CHD), palpebral fissure length (PFL), fundoscopy, and palpebral conjunctiva microbiota from healthy giant anteaters. Animals studied: Twelve giant anteaters (Myrmecophaga tridactyla), 11 adults and one juvenile, five males and seven females. Procedures: The animals were submitted to general anesthesia and ophthalmic evaluation with portable slit‐lamp biomicroscope, Finoff transilluminator, and fundoscopy, as well as STT, bacterial culture from palpebral conjunctiva, rebound tonometry IOP, and measurement of PFL and CHD. Data compiled were analyzed with ANOVA and Tukey tests. Results: The results (mean ± standard deviation) were as follows: STT 8.04 ± 6.21 mm/min; IOP 10.92 ± 2.45 mmHg; PFL 0.75 ± 0.11 cm; CHD 0.96 ± 0.10 cm. Out of the 24 eyes swab samples for bacterial culture, 17 were positive, with three genera of Gram‐positive bacteria identified Staphylococcus spp., Bacillus sp., and Corynebacterium sp. Gram‐negative bacteria were not isolated from any of the samples. Conclusions: As conservation work in this vulnerable species continues, this report on basic ophthalmic examination and diagnostic parameters will be helpful improve their treatment and care. More ophthalmic studies are encouraged in animals within the Pilosa order. [ABSTRACT FROM AUTHOR]

Objective: To describe ocular anatomical features and to determine tear production and tonometry in normal anesthetized ring‐tailed coati (Nasua nasua). Animals: Eight male and seven female ring‐tailed coatis (30 eyes) were evaluated, with ages ranging from 7 months to 10 years old. Procedures: The animals were anesthetized with isoflurane and had STT 1, rebound and applanation tonometry, and palpebral fissure length (PFL) measured in both eyes. Rebound tonometry was measured with both TonoVet® and TonoVet Plus®. All eyes were evaluated with slit‐lamp biomicroscopy. Following pharmacological mydriasis, direct fundoscopy was performed. ANOVA and Tukey tests were used for the data analysis. Results: There were upper and lower eyelids, as well as a third eyelid. Eyelashes were present on the upper eyelid, while meibomian glands openings were visible on both. The bulbar conjunctiva was pigmented. The pupil was obliquely horizontally ovoid and teardrop shaped when miotic. The color of the iris and tapetum lucidum varied with age. The optic disk was round, and the retina was holangiotic. The mean ± standard deviation values obtained were as follows: STT: 2.50 ± 2.39 mm/min; rebound tonometry: 9.50 ± 2.43 mmHg (TonoVet®, calibration P), 14.60 ± 2.82 mmHg (TonoVet®, calibration D), 18.93 ± 3.99 mmHg (TonoVet Plus®, calibration dog); applanation tonometry: 18.66 ± 4.16 mmHg; PFL: 10.98 ± 1.67 mm. Conclusions and Clinical Relevance: Anatomical and clinical ophthalmic data presented in this study are unprecedented for this species. The results can be used as clinical reference parameters, allowing for better care of these species. The lack of data for the Procyonidae family must be regarded as an incentive for more studies. [ABSTRACT FROM AUTHOR]

Objective: To describe selected ophthalmic tests and anatomical features of eyes of crab-eating foxes (Cerdocyon thous) and maned wolves (Chrysocyon brachyurus). Animals studied: Six crab-eating foxes (12 eyes), eight maned wolves (16 eyes). Procedures: Intramuscular and/or inhalatory anesthesia, ophthalmic evaluation with portable slit-lamp biomicroscope, Schirmer tear test (STT), intraocular pressure measurement with rebound and applanation (crab-eating fox only) tonometers, measurement of palpebral fissure length (PFL), gonioscopy, and fundoscopy. Data were analyzed with ANOVA and Tukey's tests. Results: Both species presented upper and lower eyelids, both with eyelashes and Meibomian glands openings. A third eyelid was also present. In partial miosis, pigmented projections were observed along the edge of the pupil. The draining angle was open, with thin pectinate ligaments. The retina was holangiotic. For crab-eating foxes, mean ± standard deviation values were as follows: STT: 4.33 ± 2.96 mm/min; PFL: 17.45 ± 1.55 mm; rebound tonometry: 10.70 ± 3.43 mm Hg (TonoVet® calibration D),5.66 ± 3.44 mm Hg (TonoVet®calibration P), 17.00 ± 4.64 mm Hg (TonoVet® Plus calibration dog); and applanation tonometry: 11.70 ± 5.70 mm Hg(TonoPen® XL). For maned wolves, the mean ± standard deviation values were as follows: STT: 9.31 ± 7.40 mm/min; PFL: 22.79 ± 1.63 mm; rebound tonometry: 11.00 ± 2.77 mm Hg (TonoVet® calibration D), 6.78 ± 2.58 mm Hg (TonoVet® calibration P), and 18.29 ± 3.47 mm Hg(TonoVet® Plus calibration dog). Conclusions: This study contributes with knowledge that can help the clinical assessment regarding eyes of crab-eating foxes and maned wolves. The data herein presented for rebound tonometry are new for both species. [ABSTRACT FROM AUTHOR]

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Objective Guinea pigs have a very low threshold of corneal sensitivity and at the same time nearly no reflex tearing compared to dogs, cats, and horses. The question arose whether there is a general correlation between corneal sensitivity and the quantity of reflex tearing. Animals studied Totally 160 animals of 8 different species (20 animals per species) were investigated. Procedures The corneal touch threshold (CTT) was measured with a Cochet-Bonnet esthesiometer. The palpebral fissure length (PFL) was measured with a calliper ruler. The Schirmer tear test (STT) was modified by adapting the width of the STT strip to the PFL of every species. For the STT II, 0.4% oxybuprocaine was applied. Results Corneal touch threshold: Cows (1.67 g/mm2), horses (1.23 g/mm2), sheep (1.13 g/mm2), goats (1.44 g/mm2), dogs (2.16 g/mm2), and cats (1.33 g/mm2) show similar CTT values. In contrast, rabbits (6.21 g/mm2) and guinea pigs (7.75 g/mm2) show a significantly lower CTT. Tear Production Difference STT I − STT II: Rabbits have the greatest decline in tear production with 38.4%, followed by sheep (33.3%), dogs (31.1%), cats (24.7%), cows (23.7%), horses (18.0%), and goats (14.0%). Guinea pigs have no decline, but a slight increase of −16.0%. Correlation CTT and STT II − STT I Difference: Pearson's correlation coefficient shows a small, but significant correlation. The coefficient of determination can only forecast a value with 7.1% certainty. Conclusions The high variance and low reproducibility of results suggest that the measuring devices are inappropriate to assess the evaluated parameters. Therefore, no assured correlation between the corneal sensitivity and the quantity of reflex tearing could be found. [ABSTRACT FROM AUTHOR]

A novel surgical combination technique for the correction of lateral lower lid entropion in dogs and cats is described, involving a combination of Hotz–Celsus and lateral eyelid wedge resection procedures. The technique was used to treat 311 eyes with lower lid entropion: 269 canine (109 bilateral, 51 unilateral) and 42 feline (16 bilateral, 10 unilateral). The most common canine breeds were the Shar Pei, Rottweiler, Bull Mastiff and Labrador Retriever. Domestic cats made up the majority of feline cases. The overall success rate for a single surgical procedure to correct lower lid entropion with this technique was 94.2% per eye. [ABSTRACT FROM AUTHOR]

ABSTRACT: The aim of this study was to describe the modified Schirmer tear test (mSTT), intraocular pressure (IOP) by rebound tonometry and palpebral fissure length (PFL) in blue-fronted Amazon parrots (Amazona aestiva). Thirty-five healthy adult animals from a conservation breeding center in Brazil were used in this study. Modified Schirmer tear test, rebound tonometry and PFL measurements were performed in both eyes, with birds under physical restraint. Mean mSTT was 6.2±0.1mm/min and mean IOP was 6.4±0.1mmHg, while PFL was 10.1±0.1mm. A moderate correlation was seen between mSTT and PFL for OD (ρ=0.14) and OS (ρ=0.20). The results provide ophthalmic tests reference values for A. aestiva.