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31 Cards in this Set
- Front
- Back
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Vol of eyeball |
6ml |
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AP diameter of eyeball |
24mm |
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Site of intravitreal inj |
Oro serrata Vol 0.05 ml |
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A)Distance btw limbus and ciliary body B)Distance btw limbus and oro serrata |
A)1mm B)6mm |
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Distance of intravitreal inj in A)aphakia B)pseudophakia C)phakia |
A)3mm B)3.5mm C)4mm |
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Aqueous humour Vol |
0.31ml Ant seg - 0.25ml Post. Seg - 0.06ml |
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Rate of pdtion of aqueous humour |
2-3ul/min |
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Depth of aqueous chamber |
3mm Deep in myopes, young Shallow in hypermetropes , old |
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Recti muscle that has only one artery branch supply |
Lateral rectus |
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Development of eye starts at |
3rd week of IUL |
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Structures from surface ectoderm |
Conj epi Cornea epi Tarsal gland Lacrimal gland Eyelid skin Lens |
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Neuro ectoderm derivatives |
Smooth muscle of iris - dilator and sphincter pupillae Epi of ciliary body and iris Part of 2' vitreous Retina Optic nerveq |
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Neural crest cells derivatives |
Cornea - bowman, stroma, descement Stroma of iris and ciliary body Ciliary muscle Trabecular meshwork Sclera Optic N sheath Melanocytes |
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Mesodermal derivatives |
EOM Sclera temporal part Vascular endothelial lining Connective tissue |
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Nourishment to lens during development |
Tunica vasculosa lentis |
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Coloboma |
Failure of choroidal tissue/fetal fissure to close by 6th - 7th week gestation |
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Genes a/w Isolated aniridia |
PAX 6 Gene |
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Cornea reaches adult size by |
2 yrs |
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Macula fully diff at |
4-6 months of age |
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Visual acuity is attained by |
6 yrs of age |
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Fixation of eye starts and completes at |
Starts at 1st month Completes at 6th month |
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Binocular vision is attained at |
3 months Also follows moving objects |
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Depth perception. Stereopsis. Coloir vision. Eye body coord attained at |
5-6 months of age |
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Retina is fully diff except for |
Macula Diff at 4-6 months |
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Eye features at birth |
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Newborn eye is myopic or hypermetropic |
Hypermetropic +2 - +3D |
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Mittendorf dots |
Embryonic remnant of anterior end of hyaloid artery |
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Bergmeister papilla |
Embryonic remnant of posterior end of hyaloid artery |
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Ap diameter of eyeball |
At birth 16.5 mm At 3 yrs 23mm At 4-15 yrs increases by 1 mm to reach adult size |
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Whitnalls tubercle/lateral orbit tubercle |
Seen in lateral margin of orbit (orbital surface of zygomatic bone) Four structures are attached to it Lateral palpebral lig Lockwood lig (suspensory ligament of eyeball) Check lig of lateral rectus Lateral horn of levator aponeurosis |
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Optic foramen is situated btw |
2 roots of lesser wing of sphenoid But it formed by body of sphenoid medially and lesser wing laterally |
