A Modified Schirmer Tear Test in Clinically Normal Horses: Measurement at 30 Seconds versus 60 Seconds.

This study sought to compare the Schirmer Tear Test (STT)-1 results at 30 (STT30) versus 60 (STT60) seconds in healthy horses. This study included a total of 56 healthy horses. STT-1 was performed in both eyes, right eye first, and the wetting lengths were measured in STT30 and STT60.

Comparison of central corneal thickness in dogs measured by ultrasound pachymetry and ultrasound biomicroscopy.

Ultrasound pachymetry (UP) is currently the most common technique used to evaluate central corneal thickness (CCT). New devices which allow assessment of CCT without corneal contact have been compared, but there are discrepancies among instruments. The aim of this study was to compare CCT measurements obtained by UP and ultrasound biomicroscopy (UBM) in 28 eyes of 14 healthy Beagles dogs.

Diurnal variations in intraocular pressure and central corneal thickness and the correlation between these factors in dogs.

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.

Diurnal variations of central corneal thickness and intraocular pressure in dogs from 8:00 am to 8:00 pm.

Diurnal variations in central corneal thickness (CCT) and intraocular pressure (IOP) and their relationships were studied in healthy dogs. Central corneal thickness was measured by ultrasonic pachymetry and IOP by applanation tonometry in 16 beagle dogs. Measurements were taken every 90 min over 12 h (08:00 am to 08:00 pm).

Refractive state of the Spanish Thoroughbred horse: a comparison with the Crossbred horse.

Objective: To assess the refractive state of the equine eye utilizing retinoscopy. To compare the refractive state of Spanish Thoroughbred horses with the refractive state of Crossbred horses.

Procedures: The refractive state of 135 horses (264 eyes) was assessed utilizing streak retinoscopy.

Bilateral typical complete colobomas in a donkey: retinographic and fluorangiographic description.

An 18-year-old male donkey was referred with a history of blindness. On ocular examination a complete bilateral typical colobomatous defect involving iris, ciliary body, lens, choroid, retina and optic nerve was observed. An optic pit was presented at the temporal side of the right optic head.

Fluorangiographic study of the ocular fundus in normal horses.

Purpose: To describe the protocol and appearance of fluorescein angiography (FA) in normal horses.

Animals: A total of 25 healthy horses aged between 5 and 15 years.

Materials And Methods: The horses were sedated with 15 microg/kg detomidine and 50 microg/kg butorphanol and dilated with topical tropicamide 1%.

The ocular effects of intravitreal triamcinolone acetonide in dogs.

The aim of the study was to determine the ocular safety of a single intravitreal dose of triamcinolone acetonide (IVTA) in dogs. Eleven healthy dogs received a single IVTA injection (8 mg) through the mid-temporal pars-plana of the left eye (OS) using a 27G needle. The dogs were re-evaluated immediately post-IVTA, every 5 min until pre-IVTA values had returned, then daily for 3 days, weekly for 1 month and monthly for 3 months.

Comparative fluorescein angiography of the normal sheep and goat ocular fundi.

Fluorescein angiography without sedative or anesthetic agents was evaluated in 20 normal goats and 20 normal sheep. All of the angiographic phases were observed using 20 mg/kg fluorescein IV in both species. Fundus fluorescein angiography results revealed wide stars of Winslow in the tapetal fundus, central or marginal flow during the first part of the arterial phase, delayed filling of the focal areas in the choroid near the optic disc that often coincided with others in the disc, and lack of evidence of the 'striate area' in the tapetal fundi.