Voyeurism: when does it become a condition and can it be treated?

A NSW man recently jailed after filming up skirts had his prison sentence overturned, prompting questions about the little-known disorder

• Get our morning and afternoon news emails, free app or daily news podcast

A New South Wales high school teacher who was jailed in July for secretly filming up the skirts of his female students has had his prison sentence overturned on appeal.

A judge ruled that Eric Wong, formerly a science teacher at Cammeraygal High School in Sydney, would not be able to access the necessary treatment for his voyeuristic disorder in prison and that a two-year intensive correction order, a custodial sentence served in the community, would be more beneficial to community safety.

Sign up for Guardian Australia's free morning and afternoon email newsletters for your daily news roundup