Tear film components interacting with the lens material create jelly bump deposits. Soft lenses are most prone because they’re made of hydrated, porous hydrogel or silicone hydrogel that readily absorbs tear proteins, mucins, and lipids. This absorption and the presence of mucus in the tear film allow these substances to coalesce on the lens surface into small, jelly-like bumps, especially with extended wear or longer use between cleanings. Rigid gas-permeable lenses, being less absorbent and having a different surface interaction with tears, don’t typically form these jelly-like deposits. Daily disposable lenses are replaced frequently, so there’s little time for such buildup to develop. Hybrid lenses can have a soft component, but the deposit pattern that leads to jelly bumps aligns with the properties of soft lenses, making them the most commonly associated type. Regular lens hygiene, appropriate wear schedules, and opting for daily disposables when appropriate help mitigate these deposits.

Illuminating the corneal surface from an oblique angle to highlight surface irregularities is what makes EBMD patterns visible. EBMD produces map-like and fingerprint patterns in the epithelial layer, and these subtle changes are best seen when light is directed to skim the surface rather than straight on. Indirect illumination provides that angled, shadow-promoting lighting, which enhances the contrast of the epithelial irregularities so the maps and fingerprint lines stand out during the slit-lamp exam. Other illumination modes either emphasize overall corneal clarity, give only cross-sectional detail, or don’t create the shadowing needed to reveal these surface changes, so they’re less effective for diagnosing EBMD.

Trachoma is a chronic keratoconjunctivitis that produces specific scarring and follicular changes in the conjunctiva. Follicular conjunctivitis is a hallmark sign of active trachoma, and as the disease progresses you can see Arlt's lines, which are linear conjunctival scars on the tarsus, as well as Herbert's pits, which are shallow corneal or limbal scars resulting from the longstanding inflammation. Dennie's lines, by contrast, are infrared signs of atopy and allergic conjunctivitis, presenting as extra folds or lines under the lower lid in allergic eyes. They are not typical features of trachoma, making them the sign not usually associated with this disease. So the statement not typically associated with Trachoma is Dennie's lines.

Thyroid eye disease commonly affects eyelid position and how the eye moves. A hallmark is lid lag together with changes in how the globe moves under the lid during gaze. As the eye looks in different directions, the upper eyelid can fail to track the globe smoothly and appears to lag, especially on downgaze. This reflects inflammatory and fibrotic changes around the extraocular muscles and eyelid retractors, leading to signs like lid retraction, proptosis, and restricted eye movements. So, statements describing lid lag and globe-lid movement with gaze accurately capture the characteristic signs. These signs are not just about eyelid edema, they are closely tied to eyelid position, they are not markers of glaucoma, and they are indeed related to how the eyelid and globe move together.