scholarly journals Characterizing Visual Field Deficits in Cerebral/Cortical Visual Impairment (CVI) Using Combined Diffusion Based Imaging and Functional Retinotopic Mapping: A Case Study

2016 ◽  
Vol 10 ◽  
Author(s):  
Lotfi B. Merabet ◽  
Kathryn J. Devaney ◽  
Corinna M. Bauer ◽  
Aparna Panja ◽  
Gena Heidary ◽  
...  
Keyword(s):  
Visual Field ◽  
Visual Impairment ◽  
Retinotopic Mapping ◽  
Visual Field Deficits ◽  
Cortical Visual Impairment

Predictor of Visual Impairment Following Paraclinoid Aneurysm Surgery: Special Consideration of Surgical Microanatomy Related to Paraclinoid Structures

2020 ◽  
Vol 20 (1) ◽  
pp. 45-54
Author(s):  
Nakao Ota ◽  
Ioannis Petrakakis ◽  
Kosumo Noda ◽  
Takanori Miyazaki ◽  
Tomomasa Kondo ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Visual Field ◽  
Visual Impairment ◽  
Multivariate Logistic Regression Analysis ◽  
Visual Deficits ◽  
Microsurgical Clipping ◽  
Paraclinoid Aneurysm ◽  
Paraclinoid Aneurysms ◽  
Visual Field Deficits

Abstract BACKGROUND Microsurgical clipping with extradural anterior clinoidectomy (EDAC) for paraclinoid aneurysm is an established technique with good angiographic outcomes, although postoperative worsening of visual acuity remains a concern. Multiple reports show visual acuity deteriorating after clipping, yet the cause remains unclear. OBJECTIVE To analyze results of asymptomatic paraclinoid aneurysm surgeries treated with EDACs, specifically focusing on the microanatomy of paraclinoid structure dissection. This determined the causes of delayed visual impairment and microsurgical indications. METHODS Results of the treatment with EDAC of 94 patients with cerebral aneurysm and normal preoperative visual acuity but also full visual fields were retrospectively analyzed. RESULTS The mean aneurysm size was 6.2 (±3.3) mm. Clipping was performed in 87 cases and trapping in 7 cases. Complete angiographic occlusion was observed in 91 patients. In 26 cases, a postoperative visual deficit occurred. A total of 20 cases exhibited partial visual field deficits, including 5 who were asymptomatic. Visual deficits were only detectable by postoperative ophthalmologic testing. Six showed light perception impairment or blinding. Of the 15 patients with symptomatic partial visual field deficits, 5 showed improvement at follow-up. Visual deficits persisted in 22 patients at the last follow-up. Multivariate logistic regression analysis revealed that medial projecting aneurysm (adjusted odds ratio [OR]: 10.43) and the opening of the carotidoculomotor membrane (adjusted OR: 5.19) were significantly related to visual impairment. CONCLUSION Excess dissection of carotidoculomotor membranes causes postoperative delayed visual worsening. For treating small, asymptomatic paraclinoid aneurysms, carotidoculomotor membranes should not be opened, and microsurgical clipping should not be performed for preoperative asymptomatic medial projecting aneurysms.

Cortical Visual Impairment in Infants and Children

2001 ◽  
Vol 41 (1) ◽  
pp. 159-169 ◽  
Author(s):  
Mehran A. Afshari ◽  
Nasrin A. Afshari ◽  
Anne B. Fulton
Keyword(s):  
Visual Impairment ◽  
Infants And Children ◽  
Cortical Visual Impairment ◽  
In Infants And Children

scholarly journals Do visual field deficits exacerbate visuo-spatial neglect?

1990 ◽  
Vol 53 (6) ◽  
pp. 487-491 ◽  
Author(s):  
P W Halligan ◽  
J C Marshall ◽  
D T Wade
Keyword(s):  
Visual Field ◽  
Spatial Neglect ◽  
Visual Field Deficits
Sign in / Sign up

Export Citation Format

Share Document