A person who is professionally trained and licensed to examine the eyes for visual defects,diagnose problems or impairments,and prescribe corrective lenses or provide other types of treatment.

• 验光师，配镜师经过专业训练并领取执照以专门从事对眼睛的视力缺陷、疑难杂症或损害情况进行检查的人，他还负责提供有助视力改善的眼镜或其他类型的治疗手段。