11-cis-retinal combines with opsin protein to form rhodopsin. Light stimulates conversion of rhodopsin bound 11-cis-retinal to all-trans-retinol (all-trans-retinol is transported from photoreceptor cells to retinal…
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Synonyms: Dorsal midbrain sydnrome, Pretectal syndrome Main components of Parinaud syndrome: Vertical gaze palsy Convergence-retraction nystagmus Pupillary light-near dissociation Lid retraction (Collier’s sign) Anatomical basis…
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Surface ectoderm derivatives Mnemonic: LEVeL Lens Epithelium All ocular adnexa including mebomian gland and glands of Zeis and Moll Skin Cornea Conjunctiva Vitreous (portion) Lacrimal…
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Mechanism of Ethambutol induced optic neuropathy Ethambutol is metabolized to a chelating agent. The chelating agent formed then may impair the function of metal-containing mitochondiral…
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Everyone must be aware of the normal visual pathway and their defects. Here, I’ve tried to enlist the topics related to the visual pathway that…
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The ten layers of retina – this microscopic anatomy is frequently asked in examinations and also important from the physiological viewpoint. There are plenty of…
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Components of Pathway For both eyes to look at a side: Contralateral Frontal Eye Field (Brodmann area 8) Ipsilateral PPRF (Paramedial Pontine Reticular Formation) Ipsilateral…
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Diagnosis of the etiology of vision loss requires a step-wise systematic approach. The vision loss may be sudden or gradual, painful or painless, unilateral or…
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