Related Experiment Video
Updated: Jun 2, 2026

07:43
Establishment of a Severe Dry Eye Model Using Complete Dacryoadenectomy in Rabbits
Published on: January 8, 2020
Caliber persistent artery of the eyelid
Kelvin K Y Wong1, Fiona Roberts, Paul Cauchi
1Ophthalmology Department, Southern General Hospital, Glasgow G51 4TF, United Kingdom. klf032@yahoo.co.uk
Summary
Caliber persistent artery, a vascular condition typically seen on the lips, can also present as a painless red eyelid lesion. This case series highlights its occurrence in the eyelid, aiding in diagnosis.
Area of Science:
- Ophthalmology
- Dermatology
- Vascular Surgery
Background:
- Caliber persistent artery (CPA) is a vascular anomaly typically found on the lips.
- This report details three cases of CPA presenting in the eyelid, a rare occurrence.
Observation:
- Three patients presented with painless, red eyelid lesions.
- Lesions were located on the lower eyelid in two patients and the upper eyelid in one.
- One patient exhibited bilateral lower eyelid lesions.
Findings:
- Histological examination confirmed a large caliber artery within the dermis.
- The artery's orientation was nearly perpendicular to the skin surface.
- Findings were consistent with caliber persistent artery.
Implications:
- CPA should be considered in the differential diagnosis of eyelid vascular lesions.
- This study represents the first reports of CPA affecting the eyelids.
- Early recognition can guide appropriate clinical management.
Related Concept Videos
Accessory Structures of the Eye
Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
Muscles of the Eye
The muscles of the eye are sophisticated structures that control eye movement and focus, allowing for the precise and rapid adjustments necessary for vision. The human eye is controlled by ten muscles — six extraocular muscles, three intraocular muscles, and one primary eyelid retractor muscle.
Extraocular Muscles
The six extraocular muscles surround the eyeball and control its movements. They are responsible for a wide range of eye motions, including looking up, down, left, right, and rotating...
Extraocular Muscles
The six extraocular muscles surround the eyeball and control its movements. They are responsible for a wide range of eye motions, including looking up, down, left, right, and rotating...
Anatomy of the Eyeball
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle layer, the vascular tunic,...
Ophthalmic Drug Delivery Systems
Ophthalmic drug delivery faces major limitations due to poor absorption across the corneal membrane. This process is primarily driven by diffusion and is influenced by two main factors: the physicochemical properties of the drug and tear drainage. Most ophthalmic drugs, such as pilocarpine, epinephrine, atropine, and local anesthetics, are weak bases. They are typically formulated at an acidic pH to enhance chemical stability. However, this leads to high ionization, reducing their ability to...
The Arch of Aorta
The coronary arteries, originating from the ascending aorta, bifurcate from two sinuses located within the ascending aorta. Positioned just above the aortic semilunar valve, these sinuses house essential aortic baroreceptors and chemoreceptors, crucial for maintaining cardiac function. The left coronary artery and the right coronary artery branch off from the left posterior and anterior aortic sinuses, respectively.
Encircling the heart, the coronary arteries form a ring-like structure before...
Encircling the heart, the coronary arteries form a ring-like structure before...
Sites for measuring blood pressure
Blood pressure measurement is a fundamental clinical procedure, providing crucial data for assessing cardiovascular health. Among the various sites for this measurement, the brachial and popliteal arteries are predominantly utilized due to their accessibility and the reliability of their readings. This lesson delves into the anatomical significance, methodology, and considerations of measuring blood pressure at these locations.
The Brachial Artery: Primary Site for Blood Pressure Measurement
The Brachial Artery: Primary Site for Blood Pressure Measurement

