eyelid
Let an agent explain the eyelid and its structure and function, relay common conditions and care in general terms from clinical sources, describe surgical and cosmetic aspects, and route personal eye questions to eye care professionals.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain the eyelid and its structure and function, relay common conditions and care in general terms from clinical sources, describe surgical and cosmetic aspects, and route personal eye questions to eye care professionals.
A thin fold of skin and muscle that covers and protects the eye, the upper and lower eyelids meeting at the canthi, lined with conjunctiva, bearing eyelashes and glands, and closing by blinking to spread tears and shield the eye from light, dust and injury; eyelids are subject to conditions such as ptosis, blepharitis, styes and skin cancers, are the site of cosmetic and reconstructive surgery, and in some fish the adipose eyelid is a transparent covering.
What it is for: Protecting and lubricating the eye.
It can be explain structure and function; relay common conditions in general terms; describe surgery and cosmetics; route personal questions.
Distinguishing features
Thinnest skin
Blinking reflex
Glands and lashes
Cosmetic significance
What it looks like
Folds of skin above and below the eye with lashes along the margins.
Physical character
blink rate: about 15-20 per minute - adults at rest
eyelid skin thickness: under 1 mm - thinnest on the body
How it is recognised
Protective folds covering the eye
Upper and lower eyelids, adipose eyelid in fish
The eyebrow is above the eyelid; the conjunctiva lines it; the nictitating membrane is a third eyelid in some animals
Related models
is a kind of - in registry terms
is a kind of - in registry terms
protects - the organ
bears - along its margin
In practice
Families and kinds
upper eyelid
lower eyelid
eyelid structures: tarsal plate, orbicularis, levator, meibomian glands, lashes
nictitating membrane in animals
adipose eyelid in fish
eyelid variations such as the epicanthic fold
Identifiers
TA2 palpebrae Terminologia Anatomica
MeSH D005143 eyelids
Standards and regulation
Ophthalmology and oculoplastic surgery guidelines
Cosmetic surgery regulation
Cosmetics safety rules for eye products
Failure modes and hazards
Ptosis, infections and tumours
Agents giving personal medical advice
Cosmetic surgery risks
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.eyelid
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What the eyelid is.
Science.
Structure
Structure.
Structure
Structure.
- How is the eyelid built, from skin and muscle to tarsal plate and glands? definition
- Is the question about the eyelid, the eyebrow or the conjunctiva? boundary
Function
Function.
Function
Function.
- How do blinking, tear spreading and closure protect the eye? definition
- Which entry fits blinking? action
Clinical Conditions and care.
Clinical.
Conditions
Conditions.
Conditions
Conditions.
- What common conditions affect eyelids, such as ptosis, blepharitis, styes and tumours, in general terms? provenance
- Is the user describing eyelid symptoms, which need an eye care professional? boundary
Care
Care and hygiene.
Care
Care.
- What eyelid hygiene and care do clinicians recommend? provenance
- Which references are standard? provenance
Surgery Surgery and cosmetics.
Attribution.
Surgery
Oculoplastic surgery.
Surgery
Surgery.
- What reconstructive and cosmetic eyelid surgeries exist, and what are their risks, in general terms? provenance
- Is the user considering surgery, which needs a qualified surgeon consultation? boundary
Cosmetics
Cosmetics and culture.
Cosmetics
Cosmetics.
- How are eyelids treated in makeup and cultural beauty norms, with attribution? provenance
- Which sources are cited? provenance
Context Animals and development.
Context.
Animals
Eyelids in animals.
Animals
Animals.
- How do eyelids vary across animals, including nictitating membranes and adipose eyelids? provenance
- Which entry fits nictitating membrane? action
Development
Development.
Development
Development.
- How do eyelids develop in the embryo? provenance
- Which entry fits eye development? action
What the second pass must settle
- Should eyelid conditions be separate entries?
- How should anatomical references be linked?
- The registry entry has merged aliases naming parts and a fish structure; should they be split off?