Intraocular pressure (IOP) reflects a balance between aqueous humor production and outflow and is often an essential ophthalmic diagnostic procedure in animals. The objective of this study was to estimate IOP in clinically normal red-footed tortoises (Geochelone carbonaria) of various sizes by using applanation tonometry. Intraocular pressures were estimated for 25 captive red-footed tortoises (10 males, 10 females, and 5 animals of unknown sex) by using an applanation tonometer after topical anesthesia. Body length ranged from 5.1 to 54.9 cm, measured from nuchal to anal scutes. Five measurements from each eye were obtained by a single observer in an ambient temperature of approximately 30°C. Observer's reliability was good (intraclass r = 0.75), and IOP did not change over the ordered sequence of five replicate measurements. For individual tortoises the correlation for IOP between the left and right eyes was low (r = 0.20). The paired t-test did not show any statistical effect (P = 0.426) for the difference in IOP between the left and right eyes. Mean IOP determined for 10 confirmed males and 10 confirmed females did not differ between sexes (P = 0.244). The mean IOP of five small tortoises (<10 cm long) was not significantly different (P = 0.244) from that of 20 large tortoises (>10 cm long). In red-footed tortoises there does not appear to be any relation between carapace length and IOP.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 33 • No. 1