Modified dynamic visual acuity tests after acoustic neuroma resection

Acta Otolaryngol. 2007 Aug;127(8):825-8. doi: 10.1080/00016480601002047.


Conclusion: These data suggest that visual acuity during quiet sitting is dynamic, requiring full body interaction of vestibulo-ocular and postural responses. These findings may have practical implications for seating design and design of tasks requiring good visual acuity while seated.

Objectives: Looking at something during quiet sitting is usually assumed to be a static activity. We tested the idea that visual acuity during quiet sitting is dynamic, requiring integration of whole body responses as well as intact vestibulo-ocular reflexes.

Materials and methods: Normal subjects and patients scheduled for acoustic neuroma resection were tested preoperatively. Patients were then tested during the four in-patient postoperative days. Testing was done while seated, with or without head and back support, while reading numbers from slides on a laptop computer at eye level, in font sizes from 20 pt to 12 pt. The dependent measure was percent correct per font size.

Results: In both groups scores while sitting unsupported were significantly higher than with full support or only back support. In patients, scores were significantly decreased on postoperative day 1 and gradually increased toward normal but maintained the pattern of better scores when sitting unsupported than with head or back support.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Adult
  • Follow-Up Studies
  • Humans
  • Middle Aged
  • Neuroma, Acoustic / diagnosis
  • Neuroma, Acoustic / physiopathology*
  • Neuroma, Acoustic / surgery
  • Otologic Surgical Procedures / methods*
  • Postoperative Period
  • Posture / physiology
  • Reflex, Vestibulo-Ocular / physiology
  • Treatment Outcome
  • Vision Tests / methods*
  • Visual Acuity*