関: aphakic

WordNet

absence of the natural lens of the eye (usually resulting from the removal of cataracts)
of or relating to or afflicted with aphakia
someone afflicted by aphakia; someone lacking the natural lenses of the eyes

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/09/29 20:36:05」(JST)

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Aphakia is the absence of the lens of the eye, due to surgical removal, a perforating wound or ulcer, or congenital anomaly. It causes a loss of accommodation, far sightedness (hyperopia), and a deep anterior chamber. Complications include detachment of the vitreous or retina, and glaucoma.

Babies are rarely born with aphakia. Occurrence most often results from surgery to remove congenital cataracts (clouding of the eyes' lens, which can block light from entering the eye and focusing clearly). Congenital cataracts usually develop as a result of infection of the fetus or genetic reasons. It is often difficult to identify the exact cause of these cataracts, especially if only one eye is affected.

People with aphakia have relatively small pupils and their pupils dilate to a lesser degree.^[1]

Symptoms and treatment

Without the focusing power of the lens, the eye becomes very farsighted. This can be corrected by wearing glasses, contact lenses, or by implant of an artificial lens. Artificial lenses are described as "pseudophakic." Also, since the lens is responsible for adjusting the focus of vision to different lengths, patients with aphakia have a total loss of accommodation.

Some individuals have said that they perceive ultraviolet light, invisible to those with a lens, as whitish blue or whitish-violet.^[2]^[3]

Etymology

Gr. a- alfa priv + phakos, lentil, anything shaped like a lentil ^[4]

References

^ Mary V Gibbens, R Goel, S E Smith (1989). "Effect of cataract extraction on the pupil response to mydriatics" (PDF). British Journal of Ophthalmology. 73: 563–565. doi:10.1136/bjo.73.7.563.
^ R M Anderson (1983). "Visual perceptions and observations of an aphakic surgeon". Perceptual and Motor Skills. 57: 1211–1218. doi:10.2466/pms.1983.57.3f.1211.
^ David Hambling (29 May 2002). "Let the light shine in". The Guardian.
^ aphakia. (n.d.) Farlex Partner Medical Dictionary. (2012). Retrieved April 13 2016 from http://medical-dictionary.thefreedictionary.com/aphakia

External links

Columbia University's Digital Reference of Ophthalmology
Aphakia, Cincinnati Children's Hospital Medical Center Ophthalmology Division

UpToDate Contents

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1. 小児における水晶体偏位（水晶体脱臼） ectopia lentis dislocated lens in children
2. 幼児および小児における緑内障の概要 overview of glaucoma in infants and children
3. 小児における白内障 cataract in children
4. ソラレン・紫外線A（PUVA）光化学療法 psoralen plus ultraviolet a puva photochemotherapy
5. 小児における最新情報 whats new in pediatrics

English Journal

Management of aniridia and iris defects: an update on iris prosthesis options.

Weissbart SB1, Ayres BD.
Current opinion in ophthalmology.Curr Opin Ophthalmol.2016 May;27(3):244-9. doi: 10.1097/ICU.0000000000000253.
PURPOSE OF REVIEW: This review examines the advantages and limitations of the various iris prostheses as treatment for aniridia.RECENT FINDINGS: Multiple prosthetic iris devices have been developed for implantation in eyes with aniridia. However, none is currently approved for use in the USA.SUMMARY
PMID 26871656

Novel mutations in PAX6, OTX2 and NDP in anophthalmia, microphthalmia and coloboma.

Deml B1,2, Reis LM1, Lemyre E3, Clark RD4, Kariminejad A5, Semina EV1,2.
European journal of human genetics : EJHG.Eur J Hum Genet.2016 Apr;24(4):535-41. doi: 10.1038/ejhg.2015.155. Epub 2015 Jul 1.
Anophthalmia and microphthalmia (A/M) are developmental ocular malformations defined as the complete absence or reduction in size of the eye. A/M is a highly heterogeneous disorder with SOX2 and FOXE3 playing major roles in dominant and recessive pedigrees, respectively; however, the majority of cas
PMID 26130484

Evaluating the evidence for and against the use of IOLs in infants and young children.

Kumar P1, Lambert SR1.
Expert review of medical devices.Expert Rev Med Devices.2016 Apr;13(4):381-9. doi: 10.1586/17434440.2016.1153967. Epub 2016 Feb 29.
Congenital cataracts account for 5-20% of childhood blindness worldwide. In the US, the prevalence of visually significant infantile cataracts is anywhere from 3-4 per 10,000 live births. Infantile cataracts need to be removed early in life in order to prevent the onset of deprivation amblyopia. As
PMID 26878234

Japanese Journal

眼内レンズの有無によるシリコーンオイルタンポナーデ時の眼圧, 角膜内皮への影響

岩田健作,春田雅俊,上原浩嗣 [他],越山健,鶴秀敏,山川良治
日本眼科學会雜誌 117(2), 95-101, 2013-02-10
NAID 10031144358

外傷後片眼無水晶体眼となった小児の1例

柴田美奈子,石田香代子,池田史子,鹿嶋友敬,出牛陽子,桜澤貴恵,掛川悦子,武居香,高山秀男
日本視能訓練士協会誌 42(0), 129-135, 2013
生後5カ月で外傷性白内障のために人工的片眼無水晶体眼となった小児に対し、弱視・斜視治療を行った。創口部位は角膜輪部角膜中央部をはずれており、術後経過良好で、術後1カ月にソフトコンタクトレンズの装用、遮閉訓練を開始できた。眼位は内斜したり外斜したりと不安定であった。コンタクトレンズ装用の継続、健眼遮閉の徹底、コンタクトレンズ装用上からの眼鏡常用、両眼視訓練により、4歳6カ月で患眼視力1.2となった。 …
NAID 130004822848

Bilateral Microphthalmia and Aphakia Associated with Multiple Eye Abnormalities in a Free-Living European Red Deer Calf (Cervus elaphus)

MUTINELLI Franco,VERCELLI Antonella,CARMINATO Antonio [他]
The journal of veterinary medical science 74(4), 527-529, 2012-04
NAID 40019308347

Related Pictures

★リンクテーブル★

リンク元	「無水晶体」「無水晶体症」「無水晶体眼」「aphakic」
拡張検索	「postcataract aphakia」

「無水晶体」

Aphakia
Classification and external resources
Specialty	medical genetics
ICD-10	H27.0, Q12.3
ICD-9-CM	379.31, 743.35
OMIM	610256
DiseasesDB	29608 29607
MeSH	D001035
	[edit on Wikidata]