Severity of postoperative ocular pain
postoperative ocular pain, pain
The visual analogue scale (VAS) is used to assess the severity of postoperative ocular pain. The VAS for pain is composed of a 10 cm straight line, which is marked with 0 at one end and 10 at the other. A score of 0 represents “no pain,” score 1–3 represents “mild pain,” which does not affect sleeping; score 4–6 is defined as “moderate pain,” which affects night sleep; score 7–10 is regarded as “severe pain,” which severely affects sleeping [