This diagnostic image displays three infrared meibography panels (a, b, and c) of the lower eyelid, illustrating the progression of Meibomian gland dysfunction (MGD). Panel (a) shows healthy Meibomian glands characterized by a dense, parallel, and organized array of hyperreflective elongated structures extending vertically toward the eyelid margin. In panel (b), representing mild MGD, there is a visible disruption in gland continuity and density, with subtle areas of glandular thinning indicated by an arrow. Panel (c) demonstrates moderate MGD, where significant pathology is evident through widespread gland dropout and architectural distortion. The arrows in (c) highlight dark, hyporeflective regions representing the loss of functional glandular tissue. This comparison serves as an educational tool for ophthalmology to identify different stages of Meibomian gland atrophy and calculate meiboscores. The images were captured using infrared interferometry, highlighting the autofluorescence of healthy meibum against the atrophied areas.

This diagnostic image displays non-contact infrared meibography of the upper eyelid, comparing a healthy state (A) with Meibomian Gland Dysfunction (MGD) (B). Image A demonstrates a normal anatomical distribution of meibomian glands, appearing as regular, vertical, hyperreflective linear structures. Image B illustrates several pathological features of MGD: diffused ductal occlusion and plugging of the gland orifices (indicated by dotted white arrows) and posterior migration of the mucocutaneous junction with retroplacement of ductal openings (indicated by multiple thin white arrows). Morphological changes within the glands are highlighted, including cystic dilatation of the ducts containing dense, opaque secretions (black arrows and black ovals). These areas alternate with regions of significant hyporeflectivity (white ovals), representing acinar atrophy and gland dropout. This comparison serves as a clinical educational tool for identifying terminal duct obstruction and glandular degeneration during ocular surface evaluations.

This diagnostic clinical image, likely obtained via meibography, displays the meibomian glands within a human eyelid. The glands are visible as vertically oriented, light-colored parallel structures. Pathological changes associated with meibomian gland dysfunction (MGD) are highlighted by white arrows. A vertical arrow in the upper-left quadrant points to a region of increased ductal tortuosity, where the gland exhibits a spiraling or twisting morphology rather than a linear path. Horizontal arrows on the left and right peripheries indicate areas of focal gland atrophy or dropout, where the normal vertical stripes are significantly diminished or absent against the tarsal background. The image serves as an educational tool for ophthalmology and optometry to demonstrate the structural degradation and morphological remodeling of oil-producing glands in chronic ocular surface disease.

Clinical slit-lamp photographs displaying the classification of Meibomian Gland Dysfunction (MGD) based on lid margin appearance and meibum characteristics. (A) Hypersecretory MGD: Demonstrates significant lid margin hyperemia (redness) and a large volume of expressible meibum (lipid) accumulating along the posterior lid margin, often associated with inflammation. (B) Hyposecretory MGD: Shows a relatively clean, less inflamed eyelid margin with minimal meibum production, characteristic of a low-delivery state. (C) Obstructive MGD: Features an irregular, thickened lid margin with visible plugging of the meibomian gland orifices. Small yellowish mounds or 'capping' may be present at the gland openings, indicating physical obstruction of lipid flow. All three images highlight the relationship between the eyelashes, meibomian gland orifices, and the mucocutaneous junction. These images are educational tools for ophthalmologists and optometrists to differentiate between high-delivery and low-delivery MGD subtypes during physical examination.