Abstract
Members of the Order Crocodilia, including alligators, crocodiles, and caiman are efficient diurnal creatures known for their proficient nocturnal hunting. As an apex predator, they do not often suffer trauma from attack; however, their eyes are anatomically situated on the dorsal aspect of their skull such that they can submerge themselves but leave their eyes above water to survey and inspect, which may make them more susceptible to injury. Most ophthalmic disease in Crocodilians involves the cornea or the uveal tract, with uveitis topping the list of clinically significant diagnoses. There is, however, a paucity of reports of clinical ophthalmic disease in Crocodilians.
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References
Abelsdorff G (1898) Physiologische beobachtungen am Auge der Krokodile. Arch Anat Physiol (Physiol Abtstr) 155:165
Agrawal R, Chandrashekhar R, Mishra AK, Ramadevi J, Sharma Y, Aggarwal RK (2002) Cloning and sequencing of complete tau-crystallin cDNA from embryonic lens of Crocodylus palustris. J Biosci 27(3):251–259
Chiou SH, Chang WP, Lo CH, Chen SW (1987) Sequence comparison of gamma-crystallins from the reptilian and other vertebrate species. FEBS Lett 221(1):134–138
Chiou SH, Chang WP, Lo CH (1988) Biochemical comparison of lens crystallins from three reptilian species. Biochim Biophys Acta 955(1):1–9
de Jong WW, Zweers A, Versteeg M, Dessauer HC, Goodman M (1985) Alpha-Crystallin A sequences of Alligator mississippiensis and the lizard Tupinambis teguixin: molecular evolution and reptilian phylogeny. Mol Biol Evol 2(6):484–493
De Rousseau C, Bito L (1981) Intraocular pressure of rhesus monkeys (Macaca mulatta) II. Juvenile ocular hypertension and its apparent relationship to ocular growth. Exp Eye Res 32(4):407–417
Derobert Y, Medina M, Rio JP, Ward R, Reperant J, Marchand MJ, Miceli D (1999) Retinal projections in two crocodilian species, Caiman crocodilus and Crocodylus niloticus. Anat Embryol (Berl) 200(2):175–191
Dieterich CE, Dieterich HJ (1978) Electron microscopy of retinal tapetum (Caiman crocodilus). Albrecht Von Graefes Arch Klin Exp Ophthalmol 208(1-3):159–168
Ekesten B, Narfstrom K (1992) Age-related changes in intraocular pressure and iridocorneal angle in Samoyeds. Prog Vet Comp Ophthalmol 2:37–40
Emerling CA (2017) Archelosaurian color vision, parietal eye loss, and the crocodylian nocturnal bottleneck. Mol Biol Evol 34(3):666–676
Fleishman LJ, Rand AS (1989) Caiman crocodilus does not require vision for underwater prey capture. J Herpetol 23(3):296
Fleishman LJ, Howland HC, Howland MJ, Rand AS, Davenport ML (1988) Crocodiles don’t focus underwater. J Comp Physiol A 163(4):441–443
Grigg G, Gans C (1993) Morphology and physiology of the crocodylia. In: Glasby CJ, Ross GJB, Beesley PL (eds) Fauna of Australia, Amphibia and reptilia, vol 2A. Australian Government Publishing Service, Canberra, pp 326–336
Hall NH, Conley K, Berry C, Farina L, Sigler L, Wellehan JF Jr, Roehrl MH, Heard D (2011) Computed tomography of granulomatous pneumonia with oxalosis in an American alligator (Alligator mississippiensis) associated with Metarhizium anisopliae var anisopliae. J Zoo Wildl Med 42(4):700–708
Hendriks W, Mulders JW, Bibby MA, Slingsby C, Bloemendal H, de Jong WW (1988) Duck lens epsilon-crystallin and lactate dehydrogenase B4 are identical: a single-copy gene product with two distinct functions. Proc Natl Acad Sci U S A 85(19):7114–7118
Huchzermeyer LC (1994) Hepatitis in farmed hatchling Nile crocodiles (Crocodylus niloticus) due to chlamydial infection. J S Afr Vet Assoc 65(1):20–22
Huchzermeyer FW (2003) Crocodiles: biology, husbandry and diseases. CABI
Huchzermeyer FW, Langelet E, Putterill JF (2008) An outbreak of chlamydiosis in farmed Indopacific crocodiles (Crocodylus porosus). J S Afr Vet Assoc 79(2):99–100
Kalberer M, Pedler C (1963) The visual cells of the alligator: an electron microscopic study. Vis Res 61:323–329
Laurens H, Detwiler S (1921) Studies on the retina. The structure of the retina of alligator mississippiensis and its photomechanical changes. J Exp Zool 32(2):207–234
Millichamp NJ, Jacobson ER, Wolf ED (1983) Diseases of the eye and ocular adnexae in reptiles. J Am Vet Med Assoc 183(11):1205–1212
Mishra AK, Chandrashekhar R, Aggarwal RK, Sharma Y (2002) Crocodilian tau-crystallin: overexpression, purification, and characterization. Protein Expr Purif 25(1):59–64. https://doi.org/10.1006/prep.2001.1609
Nagloo N, Collin SP, Hemmi JM, Hart NS (2016) Spatial resolving power and spectral sensitivity of the saltwater crocodile, Crocodylus porosus, and the freshwater crocodile, Crocodylus johnstoni. J Exp Biol 219(Pt 9):1394–1404. https://doi.org/10.1242/jeb.135673
Neill WT (1971) The last of the ruling reptiles: alligators, crocodiles, and their kin. Columbia University Press, New York
Oaks JR (2011) A time-calibrated species tree of Crocodylia reveals a recent radiation of the true crocodiles. Evolution 65(11):3285–3297. https://doi.org/10.1111/j.1558-5646.2011.01373.x
Oria AP, Oliveira AV, Pinna MH, Martins Filho EF, Estrela-Lima A, Peixoto TC, Silva RM, Santana FO, Meneses ID, Requiao KG, Ofri R (2015) Ophthalmic diagnostic tests, orbital anatomy, and adnexal histology of the broad-snouted caiman (Caiman latirostris). Vet Ophthalmol 18(Suppl 1):30–39. https://doi.org/10.1111/vop.12115
Oriá AP, Estrela-Lima A, Teixeira LBC, Dubielzig RR, Ofri R (2021) Atypical free-floating iridociliary pigmented epithelial cysts and secondary glaucoma in a caiman (Caiman latirostris). Vet Ophthalmol. https://doi.org/10.1111/vop.12870. Epub ahead of print
Pettigrew J, Grigg G (1990) Avian pattern of visual connection in crocodiles. Proc Aust Neurosci Soc 1:114
Pigatto JA, Andrade MC, Laus JL, Santos JM, Brooks DE, Guedes PM, Barros PS (2004) Morphometric analysis of the corneal endothelium of Yacare caiman (Caiman yacare) using scanning electron microscopy. Vet Ophthalmol 7(3):205–208. https://doi.org/10.1111/j.1463-5224.2004.04025.x
Rainwater TR, Millichamp NJ, Barrantes LD, Barr BR, Montero JR, Platt SG, Abel MT, Cobb GP, Anderson TA (2011) Ocular disease in American crocodiles (Crocodylus acutus) in Costa Rica. J Wildl Dis 47(2):415–426. https://doi.org/10.7589/0090-3558-47.2.415
Reger JF (1966) The fine structure of iridial constrictor pupillae muscle of Alligator mississippiensis. Anat Rec 155(2):197–215. https://doi.org/10.1002/ar.1091550207
Rehorek SJ, Legenzoff EJ, Carmody K, Smith TD, Sedlmayr JC (2005) Alligator tears: a reevaluation of the lacrimal apparatus of the crocodilians. J Morphol 266(3):298–308. https://doi.org/10.1002/jmor.10378
Ruiz T, Campos WN, Peres TP, Goncalves GF, Ferraz RH, Nespoli PE, Sousa VR, Ribeiro AP (2015) Intraocular pressure, ultrasonographic and echobiometric findings of juvenile Yacare caiman (Caiman yacare) eye. Vet Ophthalmol 18(Suppl 1):40–45. https://doi.org/10.1111/vop.12146
Sariya L, Kladmanee K, Bhusri B, Thaijongrak P, Tonchiangsai K, Chaichoun K, Ratanakorn P (2015) Molecular evidence for genetic distinctions between Chlamydiaceae detected in Siamese crocodiles (Crocodylus siamensis) and known Chlamydiaceae species. Jpn J Vet Res 63(1):5–14
Schaller GB, Crawshaw PG Jr (1982) Fishing behavior of Paraguayan caiman (Caiman crocodilus). Copeia 1982:66–72
Schwab IR, Brooks DE (2002) He cries crocodile tears. Br J Ophthalmol 86(1):23
Schwab IR, Yuen CK, Buyukmihci NC, Blankenship TN, Fitzgerald PG (2002) Evolution of the tapetum. Trans Am Ophthalmol Soc 100:187–199. discussion 199–200
Shilton CM, Jerrett IV, Davis S, Walsh S, Benedict S, Isberg SR, Webb GJ, Manolis C, Hyndman TH, Phalen D, Brown GP, Melville L (2016) Diagnostic investigation of new disease syndromes in farmed Australian saltwater crocodiles (Crocodylus porosus) reveals associations with herpesviral infection. J Vet Diagn Invest 28(3):279–290. https://doi.org/10.1177/1040638716642268
Stapel SO, Zweers A, Dodemont HJ, Kan JH, de Jong WW (1985) Epsilon-Crystallin, a novel avian and reptilian eye lens protein. Eur J Biochem 147(1):129–136
Steel R (1989) Crocodiles, 1st edn. Christopher Helm, London, p 222
Verrier M (1933) Recherches sur la vision des reptiles. Bull Biol Fr Belg 67:350–370
Wald G, Brown PK, Kennedy D (1957) The visual system of the alligator. J Gen Physiol 40(5):703–713
Whittaker CJ, Heaton-Jones TG, Kubilis PS, Smith PJ, Brooks DE, Kosarek C, Mackay EO, Gelatt KN (1995) Intraocular pressure variation associated with body length in young American alligators (Alligator mississippiensis). Am J Vet Res 56(10):1380–1383
Whittaker C, Ofri R, Heaton-Jones T, Kubilis P, Tu H, Brooks D (1996) Eletrorretinography in the American alligators (Alligator mississippiensis). Anim Eye Res 15:103–113
Wistow GJ, Piatigorsky J (1988) Lens crystallins: the evolution and expression of proteins for a highly specialized tissue. Annu Rev Biochem 57:479–504. https://doi.org/10.1146/annurev.bi.57.070188.002403
Wyneken J (2012) Reptilian eyes and orbital structures. Proceedings Association of Reptilian and Amphibian Veterinarians, Boca Raton, FL, p 75–83
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Martinez, P.S., Plummer, C.E. (2022). Ophthalmology of Crocodilia: Alligators, Crocodiles, Caimans, and Gharials. In: Montiani-Ferreira, F., Moore, B.A., Ben-Shlomo, G. (eds) Wild and Exotic Animal Ophthalmology. Springer, Cham. https://doi.org/10.1007/978-3-030-71302-7_15
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