Clinical Classification of Age-related Macular Degeneration

Corneal nerves: structure, contents and function.

Survey of 520 eyes with uveal metastases.

The Topography of Vision in Mammals of Contrasting Life Style: Comparative Optics and Retinal Organisation

Recommended definition of MGD: Meibomian gland dysfunction (MGD) is a chronic, diffuse abnormality of the meibomian glands, commonly characterized by terminal duct obstruction and/or qualitative/quantitative changes in the glandular secretion. This may result in alteration of the tear film, symptoms of eye irritation, clinically apparent inflammation, and ocular surface disease.

Previous definitions and criteria of MGD: There is no firmly established definition of MGD published in the literature. Most researchers have used a criterion-based approach to describe the condition, with combinations of objective findings and measurements. Anatomic changes of the lid margin, expressibility of meibomian lipids, gland dropout by meibography, evaporimetry, and meibometry are most commonly used (Table 1).



Table 1.

Criteria of Meibomian Gland Dysfunction Used in Previous Works

Bradford Cannon

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System of ophthalmology