Ophthal Flashcards
Blind spot in papilledema
Enlarged
Marcus gunn pupil
When light on abnormal eye
Both pupil dilate (paradoxical dilatation)
Pupilary Escape phenomenon
ETDRS
Early treatment diabetic retinopathy study
Classification of diabetic retinopathy
Satellite lesions are cahracteristic of
Fungal ulcer
Distichiasis
Extra layer of cilia posterior to grey line
Highest innervated structure of eye
Cornea
Hutchinsons rule
In herpes zoster ophthalmicus
Involvement of nose tip suggests corneal involment
Mc nerve involved in HZ Ophthalmicus
Most specific nerve
Frontal nerve
Nasocilliary branch
Contact lens
Types material
Hard - PMMA not used now due to impermeability to oxygen
Soft - HEMA most comfortable
RGP - rigid gas permeable semisoft used in keratoconus
corneal stromal dystrophy
3 type
Granular lattice macular
Cornea verticillata
Aka orvortex keratopathy Whorl like pattern of golden brown or grey deposits in cornea Do not decrease vision Resolve after discontinuation of causes Cause Indomethacin chloroquine fabrys disease Not in tay sachs
Max refraction occurs at
Cornea :first and the most powerful refracting surface
44 D
Critical angle of cornea air interface
46 degree
Photostress test is used to differentiate visual loss due to
Macular and optic nerve disease
In this test light is thrown from ophthalomoscope then recovery time is noted which is normal in optic nerve disease and prolongedin macular
Arg pupil
B/l ,constricted ,irregular pupils
In neurosyphilis
Accomodates
Prostitutes pupil
INO
Intranuclear phthalmoplegia
Combination of ipsilateral adduction deficit & contralateral abduction deficit
Lesion medial longitudnal fasciculu s
Myopia
Short sighted
I.e cant see far
Rx concave lenses
