How does exercise cause transient vision loss (TVL)?

Updated: May 21, 2019
  • Author: Andrew J Tatham, MD, MBA, FRCOphth, FEBO, FRCS(Ed); Chief Editor: Andrew G Lee, MD  more...
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Answer

Answer

Transient vision loss during exercise may result from increased heat exposure, causing decreased nerve conduction through demyelinated nerves (as in multiple sclerosis), also known as the Uhthoff phenomenon. Exercise can also cause pigment release (eg, pigment dispersion syndrome) or lenticular (dislocation/subluxation) abnormalities, causing transient vision loss.


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