preocular


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Related to preocular: subocular, preocular tear film

preocular

(priːˈɒkjʊlə)
n
(Zoology) a scale in front of the eye of a reptile or fish
adj
1. (Zoology) zoology in front of the eye
2. (Anatomy) anatomy on the surface of the eye
References in periodicals archive ?
The production and turnover of the preocular tear film is essential in providing tissues with nourishment and lubrication, and for maintaining ocular health.
7): Elongate, porrect, densely covered by very long and dense setigerous tubercles; anterior and posterior lobes separated by a deep transverse impression dorsally at level of eyes; preocular part about twice as long as postocular part; eye (Fig.
It is well known that bacteria in the preocular tear film may colonise an area of corneal epithelial defect.
Nasal, preocular, supraocular, postocular, tympanic, coronal, parietal, and supratemporal spines invariably present; all major head spines strong, except for coronal spines, which are weak; supraocular and postocular spines and parietal ridge often rough; sphenotic spines often prominent, occasionally moderate or small in size.
Parietal ridges ending in spines; preocular, supraocular and tympanic spines well developed.
For example, according to estimates of the German Federal Association of Ophthalmologists (BVA-Bundersverband der Augenazte) between 10 and 12 million Germans suffer from occasional to severe disturbances of the preocular tear film, of which only 20% are currently being treated with tear substitutes.
The specimen agrees with Boulenger (1896), having a dorsal scale account of 17-17-15 and smooth scales on dorsum, and with Walker (1945) having a semidivided nasal scale, 1 preocular, 2 post-oculars and temporal 2-2 (Fig.
5 mm, the preocular, tympanic, superior postemporal, 2nd anterior preopercular, and 3rd superior infraorbital spines formed.
19 times HL), slightly narrow than the eye, longer than supraocular scale, with latero-inferior edge slightly straight; two postoculars, upper larger than lower scale; preocular absent; 1/1 supraocular scale, disposed obliquely (0.
5, 57-90, n = 52), usually a single instead of two preoculars, a high frequency of aberrant prefrontals, and paired dark subcaudal streaks.