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Suy giảm thị lực vỏ não

Bài này viết về một loại suy giảm thị lực. Đối với mất tầm nhìn hoặc thị lực, xem Suy giảm thị lực.

Suy giảm thị lực vỏ não (tiếng Anh: Cortical visual impairment, viết tắt là CVI) là một hình thức suy giảm thị lực gây ra bởi vấn đề của não chứ không phải do vấn đề về mắt (hội chứng sau này đôi khi gọi là "suy giảm thị lực thị giác" ("ocular visual impairment") khi được đem ra thảo luận so sánh với suy giảm thị lực vỏ não.

Triệu chứng

  • Phạm vi quan sát có thể bị giới hạn nghiêm trọng.[1] Đôi khi có một hướng nhìn nhất định làm giảm rung giật nhãn cầu, còn gọi là một "điểm vô hiệu" ("null point").[2]
  • Màu sắc và độ tương phản rất quan trọng.[3]
  • Xử lý hình ảnh có thể tốn nhiều công sức.[4]

Đọc thêm

  • Christine Roman-Lantzy (2007). Cortical Visual Impairment: An Approach to Assessment and Intervention. New York: AFB Press. ISBN 0-89128-829-5. OCLC 145378364.
  • Aubri Tallent & Andrei Tallent (2012). Little Bear Sees: How Children with Cortical Visual Impairment Can Learn to See. Little Bear Sees Publishing, of Wyatt-MacKenzie. tr. 156. ISBN 978-1936214822. OCLC 1936214822.
  • Dutton, Gordon N (2006). “Cerebral Visual Impairment: Working within and around the Limitations of Vision”. Trong Lueck, Amanda Hall; Dennison, Elizabeth; American Foundation for the Blind (biên tập). Proceedings of the Summit on Cerebral/Cortical Visual Impairment: educational, family, and medical perspectives. New York: AFB Press. ISBN 0-89128-817-1. OCLC 68133091.
  • Dutton GN, Jacobson LK (2001). “Cerebral visual impairment in children”. Seminars in neonatology: SN. 6 (6): 477–85. doi:10.1053/siny.2001.0078. PMID 12014888.
  • "Fact Sheet: Cortical Visual Impairment" by Mary Ann Demchak, Charmaine Rickard and Marty Elquist, published by The University of Nevada, Reno in the Nevada Dual Sensory Impairment Project 2002.

Tham khảo

  1. ^ Lea Hyvärinen. “Understanding the Behaviours of Children With CVI”. aph.org. Bản gốc lưu trữ ngày 4 tháng 10 năm 2006. Truy cập ngày 14 tháng 9 năm 2017.
  2. ^ “eyecond_nyst”. Sorrit.org. Bản gốc lưu trữ ngày 3 tháng 3 năm 2016. Truy cập ngày 14 tháng 9 năm 2017.
  3. ^ “Fact Sheet 022 Neurological Visual Impairment (Also known as: Cortical Visual Impairment, Delayed Visual Maturation, Cortical Blindness)”.
  4. ^ The Marshall Cavendish Encyclopedia of Personal Relationships.

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