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Visual Function Examination

  • Yun Feng
  • Baoqun Yao
Chapter
Part of the Ocular Trauma book series (OCTRA)

Abstract

Vision is mainly limited to the optics of the eye through the anatomy and physiology of the visual system. In this way, vision acuity may be a key clinical measure to show the integrity of visual pathway optical and physiological states of the eyes. Each patient must first have a routine examination of the vision acuity, regardless of the initial visit or follow-up visit. The central vision is the main sign of visual function, especially the far sight, which needs more attention. Whenever possible to use standard visual acuity chart (Snellen, ETDRS): A set of letter is set up, each letter as an integrity which is five times as large as each stroke; for patients who cannot read should use the none text chart (such as E, Landolt C) which is based on the same principles of the Snellen chart; for kindergarten children, use Allen cards, HOTV letters, or E games; for babies, use color objects, toys, or flashlights to determine vision by fixing or following objects.

Keywords

Visual function examination Vision acuity Distant vision Near vision 

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Yun Feng
    • 1
  • Baoqun Yao
    • 2
  1. 1.Department of OphthalmologyPeking University Third HospitalBeijingChina
  2. 2.Department of OphthalmologyTianjin Medical University General HospitalTianjinChina

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