Affiliation:
1. College of Veterinary Medicine Auburn University Auburn Alabama USA
2. North Carolina State University Raleigh North Carolina USA
3. Kaleidoscope Statistics Athens Georgia USA
4. Equine Clinic Munich‐Riem Munich Germany
Abstract
AbstractPurposeTo evaluate the normal refractive state in horses in NCSU and ECMR and determine the prevalence of naturally occurring refractive errors and their association with breed, age, coat color, iris color, sex, and geographic location.MethodsHorses from NCSU (January 2009–November 2012) and ECMR (January 2013–September 2016) underwent ophthalmic examination and streak retinoscopy. Location, color, breed, sex, and iris color were recorded. Gross and net refractive values for each meridian (horizontal and vertical), spherical refraction, astigmatism for both eyes, and anisometry were recorded, and statistical analyses were performed.ResultsThere is excellent agreement in refraction between the eyes of the same horse (ICC = 0.89). The median net horizontal (H), vertical (V), and spherical refraction for the total population (n = 690) were H: +0.25 D (min. −6.50 D, max. +2.34 D), V: +0.25 D (min. −7.13 D, max. +2.75D), and spherical: +0.25 D (min. −6.82 D, max. +2.17 D), all with interquartile ranges of −0.25 to 0.25 D. Emmetropia (>−0.50 D and <+0.50 D; >−0.75 D and <+0.75 D) was present in 769/1380 eyes (55.7%) and 926/1380 eyes (67.1%), respectively. Anisometropia was present in 86/690 horses (12.5%). Sex, iris color, and location were significantly associated with refraction values, whereas age, breed, and coat color were not.ConclusionsMost eyes evaluated are emmetropic, or shifted myopically, with excellent agreement between eyes of the same horse. Sex, iris color, and geographic location appear to impact refraction in horses.SupportNone.
Reference32 articles.
1. The refractive character of the eyes of mammals;Lang W;R London Ophthal Hosp Rep,1886
2. ACCOMMODATION IN THE EYES OF MAMMALS
3. Retinoscopische Refraktiebepaling Big Het Paard;Wouters L;Vlaams Diergeneeskd Tijdschr,1978
4. V. The refractive character of the eyes of horses
5. Ueber die Entstehung der Myopie bei Pferden;Sustmann;Osterr Wochenschr Tierheilkd,1912
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