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Any condition that causes the eyes to itch can contribute to darker circles due to rubbing or scratching the skin around them. Hay fever sufferers in particular will notice under-eye "smudges" during the height of the allergy season. Atopy can lead to frequent rubbing of the eyes, leading to local inflammation and increased pigmentation. [4]
The name Pseudosuchia was originally given to a group of superficially crocodile-like prehistoric reptiles from the Triassic period, but fell out of use in the late 20th century, especially after the name Crurotarsi was established in 1990 to label the clade (evolutionary grouping) of archosaurs encompassing most reptiles previously identified as pseudosuchians.
Periorbital cellulitis – An inflammation and infection of the eyelid and portions of skin around the eye. Blepharochalasis – An immune-mediated inflammation of the eyelid that is characterized by exacerbations and remissions of eyelid edema which results in a stretching and subsequent atrophy of the eyelid tissue, leading to the formation ...
The earliest known members of the group (i.e. Hesperosuchus) are early Norian in age, found in the Blue Mesa Member of the Chinle Formation.Only one sphenosuchian is currently known from the Middle Jurassic, Junggarsuchus, from the Junggar Basin (Shishugou Formation) of China during either the Bathonian or the Callovian (~165 Ma) age, [1] and the Hallopodidae are known from the Late Jurassic ...
Dermatochalasis is caused by a loss of elasticity in the connective tissue supporting the structure of the front portion of the eyelid. [3] Normally, in Caucasians, the orbicularis muscle and overlying skin form a crease near the tarsal border. [3] In dermatochalasis, the excess tissues hangs down, over the front edge of the eyelid.
Atopic dermatitis is associated with allergic disorders and affects the lower eyelid. Seborrhoeic dermatitis can be seen as the scaling of the eyebrows. Loss of eyebrows is commonly seen from both atopic and seborrhoeic dermatitis due to continuous scratching/touching. Psoriasis on the eyelids can result in madarosis.
The upper or lower eyelid can be involved, and one or both eyes may be affected. When entropion occurs in both eyes, this is known as "bilateral entropion". Repeated cases of trachoma infection may cause scarring of the inner eyelid, which may cause entropion. [3] In human cases, this condition is most common to people over 60 years of age. [4]
Dennie–Morgan fold below the lower eyelid A Dennie–Morgan fold , also known as a Dennie–Morgan line or an infraorbital fold , is a fold or line in the skin below the lower eyelid . It can simply be an ethnic/genetic trait, [ 3 ] but was found in one study to occur in 25% of patients with atopic dermatitis . [ 4 ]