Portia may refer to:

Biology
Portia (spider), a genus of jumping spiders
Anaea troglodyta or Portia, a brush-footed butterfly
Portia tree, a plant native to Polynesia
Ctt. Portia, an orchid Cattlianthe

Medication
A form of birth control made of ethinylestradiol/levonorgestrel

Other uses
Portia (moon), a moon of Uranus
Portia Club, a womens club in Payette, Idaho/USA
Portia, Missouri, a community in the United States
PORTIA portfolio-management software from Thomson Financial
HMS Lennox (1914) or HMS Portia, a Laforey-class destroyer launched in 1914

People with the given name
Portia Arthur (born 1990), Ghanaian author, writer and reporter
Porcia Catonis, the wife of Roman senator Marcus Junius Brutus (fictionalized as  a character in William Shakespeares play Julius Caesar as "Portia")
Portia Dawson, American actress
Portia de Rossi or Portia DeGeneres, Australian-born actress
Portia Doubleday, American actress
Portia Geach (1873–1959), Australian artist and feminist
Portia Holman (1903–1983), Australian child psychiatrist
Portia Mansfield (1887–1979), American dance educator and choreographer
Portia Simpson-Miller, political leader of Jamaicas Peoples National Party and Prime Minister of Jamaica
Portia White, Canadian singer
Portia Zvavahera (born 1985), Zimbabwean painter
Portia, pen name of Abigail Adams (1744-1818)
Portia, pen name of Grizelda Elizabeth Cottnam Tonge (1803-1825)

Fictional
Portia (The Merchant of Venice), a character in William Shakespeares play The Merchant of Venice
Portia Quayne, the protagonist in The Death of the Heart by Elizabeth Bowen
Portia Gibbons, character on The Mighty B!
Toxic anterior segment syndrome is an acute, sterile anterior segment inflammation following generally uneventful cataract and anterior segment surgery.One of the main factors in differentiating toxic anterior segment syndrome from an infectious endophthalmitis is the rapid onset. Most patients with toxic anterior segment syndrome will develop symptoms within 12 to 24 hours of the surgery. Common findings on anterior segment slit lamp examination include increased cell and flare with associated fibrin and possible hypopyon formation. Patients may show signs of diffuse corneal edema, and they may also show signs of iris atrophy with pupillary abnormalities and eventual increased intraocular pressure. It is important to differentiate sterile postoperative inflammation from infectious endophthalmitis because the treatments of these patients are markedly different. Patients with toxic anterior segment syndrome will often respond rapidly to treatment with topical corticosteroids, while infectious endophthalmitis must be treated with antibiotics. It is important that the patients be evaluated often to ensure that the inflammation is clearing and that the patients intraocular pressure is under control. The clearing of the inflammation and eventual patient outcome is related to the severity of the toxic insult at the time of surgery. Most patients reported to date are in the category of a moderate toxic inflammation. Toxic anterior segment syndrome may be related to problems with any irrigating solution or other solution placed in the patients eye during surgery, including balanced salt solution or anything added to solutions.