By Sohan Singh Hayreh
"No attainment is ever ultimate" Vascular problems of the optic disc and nerve are vital not just to the ophthalmologist but in addition to the neurologist and the internist. To the 1st forte staff they symbolize one reason behind blindness or critical visible impairment; to the second one staff the optic disc edema and optic atrophy visible in those issues can pose critical difficulties of analysis, or provide indica tions of the involvement of the cerebral circulate; whereas to the final team they're usually indicative of systemic sickness, fairly of the cardiovas cular process. contemporary advances in our wisdom of the blood offer of the optic nerve head have shed an important new gentle at the topic. With the new creation of fluorescein fundus angiography, an additional size has been further to the learn of the ocular and optic disc circulations, and we've got entered right into a new period within the figuring out of ocular vascular problems "in vivo". within the pre-angiography period, postmortem injection reports, even supposing very helpful, didn't thoroughly demonstrate the vascular development of the optic disc within the dwelling, in well-being, and ailment. The ophthalmoscope, absolutely, has been precious in assessing optic disc lesions, yet couldn't provide us informa tion at the circulate of the attention and optic disc "in vivo".
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Additional resources for Anterior Ischemic Optic Neuropathy
B) Visual acuity of patients with uniocular anterior ischemic optic neuropathy is summarized in Table 3. These findings suggest that: 1. In anterior ischemic optic neuropathy due to temporal arteritis, visual loss is much more marked than in non-arteritic category. CULLEN [l08] and BLODI [50, 51] also showed marked loss of vision due to temporal arteritis, it being better than counting fingers (CF) in about 20 percent of the eyes; in my series it was in 7 percent. In anterior ischemic optic neuropathy 4 I 1 I I 8 Table 3.
The electro-oculogram was recorded in the standard manner, described by ARDEN et al. , during 12 minutes of dark adaptation, followed by 12 minutes of light adaptation (luminance = 1,700 milli-Iamberts). ). The recording system incorporated a computer of average transients. The electroretinograms were measured in millimicrons, the maximum b-wave being measured from the trough of the a-wave to the peak of the b-wave. Flicker Fusion Frequency of the electroretinogram was recorded to determine whether the response was scotopic (20 Hertz or less), photopic (60 Hertz) or mixed (40 Hertz).
I, j, k, I) Fluoresceinfundus angiograms i) Pre-retinal arterial phase showing cilioretinal artery and the choroid fill before the central retinal artery (compare with Fig. b, e), with no filling of the optic disc. j) Retinal arteriovenous phase showing normal filling of retinal and choroidal vasculature with no filling of the optic disc and choriocapillaris in the peripapillary choroid. k) Retinal venous phase showing no filling of the disc and small vessels of the peripapillary choroid. I) Late phase showing well-defined and faintly fluorescent optic disc Optic Disc Changes 43 h 44 Optic Disc Changes k Fig.
Anterior Ischemic Optic Neuropathy by Sohan Singh Hayreh