الفهرس 
Hypertelorism Relevant Craniofacial AnatomyOnly 14 pages are availabe for public view
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Abstract
Summary Orbital hypertelorism (ORH) is one of the most complex and challenging problems encountered in the field of craniofacial surgery. It was first described by Greig in 1924. It was defined as interorbital distance wider than normal.1 It may be bilateral or sometimes can be only on 1 side. Orbital hypertelorism is not an entity in itself but accompanies a number of craniofacial conditions e most commonly, craniosynostosis, rare craniofacial clefts, and frontonasal dysplasia. Tessier defined hypertelorism as a true lateralization of the orbits with an increase in the interorbital distance e the distance between the osseous landmark dacryon on both medial orbital walls The ORH surgery remains a complex procedure, especially in case of craniofacial asymmetry. Recently, 3D printed models and stereolithographic models are used for planning surgeries for ORH correction. 3D printed models are advantageous than stereolithographic models because the former can be planned in terms of the osteotomies, bone grafting, and tactile sense even before surgery. Another recent technique is virtual planning, in which computer software is utilized to virtually manipulate images in accordance with the planned procedure to predict the outcome. Since the mid-1990s, computer-assisted surgery (CAS) has developed dramatically leading to a remarkable unprecedented improvement and optimization of the global approach of reconstructive craniofacial surgery, especially with regards to the management of deformities in the orbital region.