The gross anatomy of the lower eyelid is analogous to that of the upper eyelid, however, the lower eyelid has a more simplified structure with less dynamic movement. Common malpositions of the lower eyelid include entropion and ectropion, rehabilitative surgery of which requires a thorough understanding of lower eyelid anatomy. Furthermore, precise anatomic knowledge is a prerequisite for both reconstructive and cosmetic lower eyelid surgery in order for it to be performed appropriately. In this review, we present the clinical anatomy of the structures of the lower eyelid, as well as highlighting relevant surgical implications. Featured here are the structure of the different eyelid lamellae, the lower eyelid retractors and their relations, the orbital septum, fat pad compartments, and Lockwood ligament.

EndoDCR surgery performed early in AD led to rapid resolution of the condition in all cases and was associated with subsequent anatomical and functional success in 94.4% of cases. Early endoDCR surgery in the context of AD and the potential associated health economic benefits are worth further consideration and study.

Patients who already wear spectacles expect to need them after cataract surgery. Those not already wearing spectacles do not expect to need them. This latter group is at particular risk for refractive disappointment and complaint. In general, patients consider the opportunity to be free of glasses as very important.

Diagnosis can be difficult and may necessitate an orbital biopsy, in which acid-fast bacilli (AFB) and characteristic histopathology may be seen. Growth of Mycobacterium tuberculosis (mTB) from such a specimen remains the gold standard for diagnosis. Ancillary investigations include tuberculin skin tests and chest radiography, but more recently alternatives such as whole blood interferon-gamma immunological tests and PCR-based tests of pathological specimens have proven useful. The management of OTB is complex, requiring a stringent public health strategy and high levels of patient adherence, combined with long courses of multiple anti-tuberculous medications. The interaction of the human immunodeficiency virus (HIV) with TB may further complicate management.

Invasive fungal sinusitis can, rarely, occur in healthy individuals and should be suspected as a possible cause of a progressive orbital apex syndrome.