Retinal detachment begins in most cases with a retinal tear, which allows fluid to enter the subretinal space. As the retina detaches from the underlying layers of the eye it loses function and the patient may suffer from severe visual impairment. When the macula is not jet involved, visual outcome is best. Therefore, in the period between diagnosis and surgical treatment, preoperative posturing advice is prescribed to minimize the risk of retinal detachment progression towards the macula. However, there is little prospectively collected evidence to support this policy, despite the major burden of posturing to the patients and, when combined with hospital admission, to public health costs. In this study, displacement of the retinal detachment border was examined during posturing intervals and interruptions for meals and toilet visits using OCT. The purpose of this research is to develop an evidence based policy for preoperative posturing in patients with retinal detachment.