In copyright
It is possible this item is protected by copyright and/or related rights. You may be able to use this digital item under a copyright exception, otherwise you need to obtain permission from the rights-holder(s). These may be identified elsewhere in the catalogue record. Read more about copyright.
Read further guidance on copyright exceptions in the UK.
Credit
A tangent plane for accurately mapping scotomata and the fields of fixation and single vision and for indicating the precise position of double images in paralysis / Alexander Duane. In copyright. Source: Wellcome Collection.
Provider
This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)