conjunctival sac

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Related to conjunctival sac: tarsal plate, Tarsal glands


a baglike organ or structure; see also bag, pocket, and pouch.
air s's (alveolar s's) the spaces into which the alveolar ducts open distally, and with which the alveoli communicate; see also lung.
amniotic sac the sac formed by the amnion, enclosing the fetus suspended in amniotic fluid; popularly known as the bag of waters.
conjunctival sac the potential space, lined by conjunctiva, between the eyelids and the eyeball.
endolymphatic sac the blind, flattened cerebral end of the endolymphatic duct.
hernial sac the peritoneal pouch that encloses protruding intestine.
lacrimal sac the dilated upper end of the nasolacrimal duct; see also lacrimal apparatus.
yolk sac the extraembryonic membrane connected with the midgut; in vertebrates below true mammals, it contains a yolk mass.
Yolk sac in a developing embryo. From Applegate, 2000.

con·junc·ti·val sac

the space bound by the conjunctival membrane between the palpebral and bulbar conjunctiva, into which the lacrimal fluid is secreted; it is a closed space when eye is closed; when eye is open, the sac is open anteriorly through the palpebral fissure (between the eyelids).
Synonym(s): saccus conjunctivalis [TA]

con·junc·ti·val sac

(kŏn-jŭngk'tī'val sak) [TA]
The space bound by the conjunctival membrane between the palpebral and bulbar conjunctivae, into which the lacrimal fluid is secreted; it opens anteriorly between the eyelids.
Synonym(s): saccus conjunctivalis [TA] .


A thin transparent mucous membrane lining the posterior surface of the eyelids from the eyelid margin and reflected forward onto the anterior part of the eyeball where it merges with the corneal epithelium at the limbus. It thus forms a sac, the conjunctival sac, which is open at the palpebral fissure and closed when the eyes are shut. The depths of the unextended sac are 14-16 mm superiorly and 9-11 mm inferiorly. The conjunctiva is divided into three portions: (1) The portion that lines the posterior surface of the eyelids is called the palpebral conjunctiva. It is itself composed of the marginal conjunctiva, which extends from the eyelid margin to the tarsal conjunctiva; the tarsal conjunctiva, which extends from the marginal conjunctiva to the orbital conjunctiva; and the orbital conjunctiva, which extends from the tarsal conjunctiva to the fornix. (2) That lining the eyeball is the bulbar conjunctiva. It is itself composed of the limbal conjunctiva, which is fused with the episclera at the limbus and the scleral conjunctiva, which extends from the limbal conjunctiva to the fornix. (3) The intermediate part forming the bottom of the conjunctival sac, unattached to the eyelids or the eyeball and joining the bulbar and the palpebral portion is called the fornix (conjunctival fold, cul-de-sac). See dyskeratosis; lid eversion; conjunctival gland; Krause's end bulbs; subtarsal sulcus.
References in periodicals archive ?
In addition, its small size provides the possibility of insertion into the conjunctival sac of small species (LANGE et al., 2014).
Our study demonstrates that the feline conjunctival sacs are inhabited by a much more rich and diverse microbial community than could be inferred from culture-based methods.
Goat milk was diluted with well water and instilled directly as drops into conjunctival sac.
(7.) Kurokawa N, Hayashi K, Konishi M, Yamada M, Noda T, Mashima Y Increasing ofloxacin resistance of bacterial flora from conjunctival sac of preoperative ophthalmic patients in Japan.
(4) In birds, the nictitating membrane, which lies in the dorsonasal quadrant of the conjunctival sac, is a thin membrane that moves swiftly over the surface of the cornea.
Due to direct contact with the environment, the conjunctival sac is expected to harbour several microorganisms such as saprophytic fungi.1,2
Treatment in mild cases is usually by topical antibiotic ointment applied into the conjunctival sac around the eye.
There was no significant difference of incidence rate of conjunctival sac secretions between the two groups (P > 0.05).
Most of the females were from middle and lower income group working with wood and dried cow dung for cooking, which gives away lot of smoke particles, which settle down in conjunctival sac and enter nasolacrimal duct through tears and block nasolacrimal duct.
The gland was totally embedded in conjunctival sac.
Previously, we recommend the conjunctival method as the route of administration for cattle; however, this method is associated with certain difficulties, primarily a low productivity as it takes 5-10min to vaccinate one animal and there is a complexity on controlling the dosage due to back flow of the vaccine out of the conjunctival sac. Therefore, in addition to the conjunctival method, we also tested subcutaneous immunization, a more convenient and widely-used method, in this study.
Ocular surface protections was added, such as artificial tears without preservatives, dextran 70 eye drops (qid), deproteinized calf blood extract eye gel (bid), and sodium chloride conjunctival sac wash (bid).