Biometria do bulbo ocular e poder dióptrico da lente em cachorro do mato (Cerdocyon thous – Linnaeus 1766)
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Data
2017-05-24
Autores
Hussein, Anna Clara Barros [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Este estudo objetivou determinar o poder dióptrico da lente intraocular (LIO) em cachorro do mato - Cerdocyon thous e descrever valores de referência para exames oftalmológicos, além de comparar as mensurações oculares quanto ao descrito nos cães domésticos, bem como considerando o sexo, lateralidade do olho e as diferentes fórmulas analisadas para o cálculo do poder dióptrico. Para isso, foram utilizados 11 cachorros do mato (22 olhos), hígidos, com idade superior a um ano, (seis) machos e (cinco) fêmeas, com peso médio de cinco kg. As variáveis oftalmológicas realizadas foram o teste lacrimal de Schirmer tipo I (TLS I) e tonometria (PIO). O valor dióptrico da LIO foi obtido utilizando-se as fórmulas Holladay II, Holladay I, Hoffer Q, SRK/T e Haigis. Com relação ao TLS e PIO, verificaram-se valores médios de 20,31±5,31 mm e 17,68±2,97 mmHg, respectivamente. Os valores dióptricos da LIO observados variaram entre 48,36±2,67 e 60±3,4 D. Para curvatura corneal, foi encontrado o valor médio de 7,03±0,38 mm. Na comparação entre lateralidade do olho e gênero, não foram observadas diferenças nas variáveis oftalmológicas, comprimento axial, fórmulas e poder dióptrico da LIO. Conclui-se que as variáveis oftalmológicas avaliadas se assemelham aos valores descritos para cães domésticos, apesar das menores dimensões da espécie. O bulbo do cachorro do mato é extremamente curto e o valor do poder dióptrico é superior ao descrito para cães domésticos.
This study aimed to determine the dioptric power of the intraocular lens (IOL) in dogs of Cerdocyon thous and to describe reference values for ophthalmologic examinations, as well as to compare the ocular measurements as described in domestic dogs, as well as considering the gender, laterality of the dog. And the different formulas analyzed for the calculation of the dioptric power. For this, eleven puppies of the bush (22 eyes), healthy, older than one year, (six) males and (five) females, with an average weight of five kg were used. The ophthalmologic variables were the Schirmer type I tear test (TLS I) and tonometry (IOP). The dioptric value of IOL was obtained using the formulas Holladay II, Holladay I, Hoffer Q, SRK / T and Haigis. Regarding TLS and IOP, mean values were 20.31 ± 5.31 mm and 17.68 ± 2.97 mmHg, respectively. Dioptric values of IOL observed ranged from 48.36 ± 2.67 to 60 ± 3.4 D. For corneal curvature, the mean value of 7.03 ± 0.38 mm was found. In the comparison between laterality of the eye and gender, no differences were observed in ophthalmologic variables, axial length, formulas and IOP dioptric power. It is concluded that the ophthalmological variables evaluated resemble the values described for domestic dogs, despite the smaller size of the species. The bulb of the bush dog is extremely short and the value of the dioptric power is superior to that described for domestic dogs.
This study aimed to determine the dioptric power of the intraocular lens (IOL) in dogs of Cerdocyon thous and to describe reference values for ophthalmologic examinations, as well as to compare the ocular measurements as described in domestic dogs, as well as considering the gender, laterality of the dog. And the different formulas analyzed for the calculation of the dioptric power. For this, eleven puppies of the bush (22 eyes), healthy, older than one year, (six) males and (five) females, with an average weight of five kg were used. The ophthalmologic variables were the Schirmer type I tear test (TLS I) and tonometry (IOP). The dioptric value of IOL was obtained using the formulas Holladay II, Holladay I, Hoffer Q, SRK / T and Haigis. Regarding TLS and IOP, mean values were 20.31 ± 5.31 mm and 17.68 ± 2.97 mmHg, respectively. Dioptric values of IOL observed ranged from 48.36 ± 2.67 to 60 ± 3.4 D. For corneal curvature, the mean value of 7.03 ± 0.38 mm was found. In the comparison between laterality of the eye and gender, no differences were observed in ophthalmologic variables, axial length, formulas and IOP dioptric power. It is concluded that the ophthalmological variables evaluated resemble the values described for domestic dogs, despite the smaller size of the species. The bulb of the bush dog is extremely short and the value of the dioptric power is superior to that described for domestic dogs.
Descrição
Palavras-chave
Catarata, LIO, Canídeo selvagem, Ceratometria, Dioptria