microphthalmos


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Related to microphthalmos: microphthalmia

microphthalmos

 [mi″krof-thal´mus]
a developmental defect causing moderate or severe reduction in size of the eye.

mi·croph·thal·mos

(mī'krof-thal'mos),
Abnormal smallness of the eye.
[micro + G. ophthalmos, eye]

microphthalmos

/mi·croph·thal·mos/ (mi″krof-thal´mus) abnormal smallness in all dimensions of one or both eyes.

microphthalmos

[mī′krəfthal′məs]
Etymology: Gk, mikros + ophthalmos, eye
a developmental anomaly characterized by abnormal smallness of one or both eyes. When the condition occurs in the absence of other ocular defects, it is called pure microphthalmos or nanophthalmos. Also spelled microphthalmus. Also called microphthalmia. microphthalmic, adj.
enlarge picture
Left microphthalmos and bilateral iris colobomas

microphthalmia

A congenital reduction in eye size, with the ocular bulb measuring 1/2 of the normal volume in extreme cases, due to an abnormal development of the optic vesicle in the optic cup.

Aetiology
• Congenital—e.g., encephalo-ophthalmic dysplasia, focal dermal hypoplasia, Hallermann-Streiff syndrome, incontinentia pigmenti, Lenz microphthalmia syndrome, retinopathy of prematurity, trisomy 13-15.
• Infectious—e.g., CMV, herpes, rubella, toxoplasmosis.
• Toxins—e.g., foetal alcohol syndrome.

Incidence
14/105; 3–11% of all cases of blindness.

mi·croph·thal·mos

(mī'krof-thal'mŏs)
Abnormal smallness of the eye.
[micro- + G. ophthalmos, eye]

microphthalmos

The state of having an abnormally small eyeball. In severe degrees there is usually a gross defect of vision.

mi·croph·thal·mos

, microphthalmia (mī'krof-thal'mŏs, -mē-ă)
Abnormal smallness of the eye.
[micro- + G. ophthalmos, eye]

microphthalmos,

n a developmental anomaly characterized by abnormal smallness of one or both eyes.

microphthalmos

abnormal smallness in all dimensions of one or both eyes, sometimes in association with other ocular abnormalities. Recorded as occurring in piglets from sows on vitamin A-deficient diets in early pregnancy, and in dogs, where it is associated with collie eye anomaly and is an inherited defect in some breeds.

pure. microphthalmos
References in periodicals archive ?
Anophthalmos, microphthalmos and Coloboma in the United Kingdom: clinical features, results of investigations and early management.
Optical coherence tomography of bilateral posterior microphthalmos with papillomacular fold and novel features of retinoschisis and dialysis.
INTRODUCTION: Microphthalmos refers to a condition where entire eyeball is small in size.
On slit lamp examination of right eye, there was microphthalmos, microcornea, irregular depth of the anterior chamber, total typical iris coloboma in lower nasal quadrant with briskly reacting pupil and posterior sub-capsular cataract with faint fundal glow.
On slit lamp examination of left eye, there was microphthalmos, microcornea, irregular depth of the anterior chamber, iris coloboma in lower nasal quadrant with briskly reacting pupil and immature cortical cataract with faint fundal glow, details could not be made out.
DISCUSSION: Microphthalmos, microcornea, iris coloboma, posterior sub-capsular cataract and choroidal coloboma is a common condition.
Microphthalmos refers to small eye ball with axial length less than 21mm.
CONCLUSION: Microphthalmos, microcornea, iris coloboma, posterior sub-capsular cataract and choroidal coloboma is not a contra-indication for cataract surgery (phacoemulsification).
INTRODUCTION: Anophthalmos and microphthalmos are an important causes of visual impairment.
The more commonly seen microphthalmos can result from a problem in development of the globe at any stage of growth of the optic vesicle.