Keratometry, biometry and prediction of intraocular lens power in the equine eye

McMullen, Richard J.; Gilger, Brian C.

doi:10.1111/j.1463-5224.2006.00493.x

Cited by 64 publications

(115 citation statements)

References 9 publications

(16 reference statements)

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“…In addition, the ultrasonographic appearance of goat eyes showed great similarity in comparison to other domestic species (GILGER et al, 1998;OSUOBENI & HAMIZADA, 1999;BRANDÃO et al, 2004;McMULLEN & GILGER, 2006;POTTER et al, 2008). Ultrasonographic studies accomplished in two distinct bovine breeds were able to identify the ciliary artery in 70% of the animals examined (POTTER et al, 2008).…”

Section: Discussionmentioning

confidence: 95%

“…Ocular biometry is a useful tool for the assessment of abnormalities such as phthisis bulbi, microphthalmia, pseudoexophthalmia, scleral ectasia, and congenital glaucoma (BRANDÃO et al, 2007;POTTER et al, 2008). They allow calculations of intraocular lens dioptric power to be employed in eyes of animals that have undergone cataract surgery to achieve emmetropia (SAMPAIO et al, 2002;McMULLEN & GILGER, 2006;ZHOU et al, 2006;CARTER et al, 2007). Additionally, biometry values are frequently used for the construction of schematic eyes in optics (GÖRIG et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Ultrasonographic and ecobiometric findings in the eyes of adult goats

et al. 2010

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The knowledge of the normal appearance and ocular dimensions of goat eyes facilitates the use of ultrasonography in the evaluation of ocular disease. The objective of the present study was to determine ultrasonographic and ecobiometric findings in the eyes of adult goats. B- and A-mode ultrasonography was performed in 30 healthy adult goats (60 eyes) (n=5 intact females and n=15 castrated males). Ultrasonography was performed after instillation of a topical anesthetic. Lubricating jelly was placed on the 20MHz transducer tip as a stand-off pad. The transducer was placed in a longitudinal position until optimal B-scan images, according to echoes of the A-mode images, were obtained. Statistical analysis was carried out to compare the ecobiometric readings among genders (P<0.05). Means and standard deviations of the ocular structures for male and female goats, respectively, were, 3.46±0.55, 3.33±0.46mm (anterior chamber depth); 8.60±0.34, 8.65±0.39mm (lens thickness); 11.34±0.61, 11.39±0.66mm (vitreous chamber depth); and 23.43±0.92, 23.39±0.86mm (axial globe length). Ocular measurements between right and left eyes, as well as between males and females were not significantly different (P>0.05). The ultrasonographic appearances of goat eyes were very similar to those of other domestic and wild species.

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Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Ultrasonographic and ecobiometric findings in the eyes of adult goats

et al. 2010

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“…It also provided adequate contact of the transducer with the surface of the cornea, with minimal pressure on the eye, which resulted in less discomfort for the patients (McMullen & Gilger, 2006;Wilkie et al, 2006;Toni et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

“…It plays an important role before cataract surgery, it contributes to satisfactory postoperative results making it useful for the evaluation of the posterior segment and also with respect to the selection of patients who will be submitted to cataract removal. It also allows the establishment of the proper intraocular lens to be used in surgery lens replacement (McMullen & Gilger, 2006;Gift et al, 2009;Ribeiro et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Ophthalmic ultrasound of dogs with different skull conformations

Toni

Meirelles

Laus

et al. 2013

Agraria

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The aim of this study was to establish mean values for intraocular structures and analyse if the differences are present for different skull conformations in dogs. In this study, 30 dogs were selected and distributed into three groups according to skull conformation; thus, group 1 (G1) was composed of brachycephalic dogs, group 2 (G2) was composed of mesocephalic dogs and group 3 (G3) was composed of dolichocephalic dogs. A and B-mode ultrasound was performed simultaneously for obtainment of measurements relating to anterior chamber depth (D1); lens thickness (D2); vitreous chamber depth (D3); and the axial length of the eye (D4). No differences were observed when comparing left and right eyes of dogs within the same skull conformation group (p>0.05). Differences were observed when comparing D3 and D4 between groups G2 and G3 (p<0.05). Skull conformation of brachycephalic dogs did not influence intraocular measurement values when compared to dolicephalic and mesocephalic dogs. Skull conformation of dolichocephalic dogs had an influence in values of vitreous chamber and the complete length of the eye when compared to mesocephalic dogs.Key words: brachycephalic, dolichocephalic, eye, mesocephalic, ultrasound Ultrassonografia oftálmica em cães com diferentes conformações cranianas RESUMOO objetivo deste estudo foi estabelecer valores médios para as estruturas intraoculares e analisar se existem diferenças entre eles nas diversas conformações cranianas de cães. Foram selecionados 30 cães alocados em três grupos, de acordo com a conformação craniana; assim, o grupo 1 (G1) foi composto por cães braquicefálicos, o grupo 2 (G2) por cães mesocefálicos e o grupo 3 (G3) por cães dolicocefálicos; ultrassonografia em modo A e B foi realizada simultâneamente para obtenção de medidas relacionadas à profundidade de câmara anterior (D1), espessura de lente (D2), profundidade de câmara vítrea (D3) e comprimento axial do bulbo do olho (D4); diferenças não foram observadas quando comparados olhos direitos e esquerdos de cães com mesma conformação craniana (p > 0,05). Diferenças foram constatadas na comparação entre D3 e D4 dos grupos G2 e G3 (p < 0,05); a conformação do crânio braquicefálico não influenciou nos valores das medidas intraoculares quando comparados aos valores encontrados para cães dolicocefálicos e mesocefálicos; a conformação do crânio dolicocefálico influenciou nos valores das medidas intraoculares de profundidade de câmara vítrea e profundidade do bulbo do olho quando comparados aos valores encontrados para cães mesocefálicos.

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“…Both PMMA and foldable acrylic IOLs are available for canine and feline cataract surgery and an acrylic IOL is available for equine surgery. The standard feline IOL is 54 diopters [29] and while the calculated equine IOL is reported to be 30 diopters [30], the current IOL being implanted is acrylic and is 14 diopters with a 12-13 mm optic and 21-24 mm haptics [31 ]. A 21 diopter equine IOL is also available.…”

Section: Intra-operativementioning

confidence: 99%