Exercise 24  - Special Senses: Vision

Using figure 24.1 and 24.2 and models be able to identify:
    The six extrinisic muscles of the eye, their actions and innervation, also levator palpebrae superioris muscle.
    The lacrimal apparatus: lacrimal gland, puncta, superior and inferior canaliculi, lacrimal sac, nasolacrimal duct.
    Other accessory structures: eyelids, tarsal plate, tarsal glands, palpebral and bulbar conjuntiva, medial and lateral canthus, caruncle.

Using Figure 24.3, models and sheep eye be able to identify (where appropriate):
    Cornea, anterior segment (cavity)( anterior and posterior chambers), aqueous humor, sclera,  scleral venous sinus, iris, lens, suspensory ligaments, ciliary body, ciliary processes, posterior segment (cavity), vitreous humor, choroid, retina, ora serrata, optic disc, macula lutea, fovea centralis, and in sheep eye - tapetum lucidum.
    Pathological changes - glaucoma, and cataracts - what are they, and what part of the eye is affected.
Microscopic slide: photoreceptors, pigmented epithelium, bipolar cells, ganglion cells.
    Complete activities 4, 5, 6,7, 8, 9, 10, 11 and 12: visual pathways, demonstrating the blind spot (know what structure causes this and why), demonstrating afterimages, determining near point of accommodation, visual acuity testing, testing for astigmatism, color blindness, tests for binocular vision (also look at Randot plates), pupillary and convergence reflexes.