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What Is Lens Epithelial Hyperplasia?

Lens epithelial hyperplasia is an abnormal increase in the number and size of lens epithelial cells, usually after trauma, inflammation, or surgery. These cells can migrate and form plaques or pearls on the anterior or posterior capsule. The overgrowth can cloud the visual axis and contribute to secondary cataract after surgery. In some cases, it also leads to capsular contraction and changes in intraocular lens position. The finding reflects an exaggerated healing response of residual epithelial cells.

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What Is Lens Epithelial Hyperplasia?

Lens epithelial hyperplasia is an abnormal increase in the number and size of lens epithelial cells, usually after trauma, inflammation, or surgery. These cells can migrate and form plaques or pearls on the anterior or posterior capsule. The overgrowth can cloud the visual axis and contribute to secondary cataract after surgery. In some cases, it also leads to capsular contraction and changes in intraocular lens position. The finding reflects an exaggerated healing response of residual epithelial cells.

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Causes and Settings for Lens Epithelial Hyperplasia

Hyperplasia most commonly appears after cataract extraction, when residual epithelial cells along the capsulorhexis edge proliferate. Antimetabolite exposure, inflammation, and younger patient age increase the tendency to form dense plaques. Trauma and chronic uveitis can also trigger epithelial growth and metaplasia on the capsule. Certain lens abnormalities, such as persistent fetal vasculature, may show disorganized epithelial tissue from early development. The exact pattern depends on where the remaining cells were left behind.

Clinical Features and Impact on Vision

Most cases are detected on slit lamp exam as whitish plaques, pearls, or fibrotic bands on the capsule near an intraocular lens. When these changes lie outside the pupil, they cause few symptoms. If they cross the visual axis, patients notice gradual blur, glare, or decreased contrast sensitivity. Capsular contraction from hyperplastic tissue can tilt or decenter an intraocular lens and induce refractive changes. The degree of impact varies from subtle quality-of-vision complaints to clear acuity loss.

How Is Lens Epithelial Hyperplasia Diagnosed?

Diagnosis is clinical, based on observation of capsular changes in a pseudophakic or traumatized eye. Retroillumination at the slit lamp highlights plaques, pearls, and capsule folds. Optical coherence tomography or Scheimpflug imaging can document capsule thickness and intraocular lens position when needed. History of recent surgery, inflammation, or injury helps link the finding to a prior event. Other causes of posterior capsule opacity or inflammatory deposits are considered in the differential.

How Is Lens Epithelial Hyperplasia Managed?

Management depends on how much the hyperplasia affects vision. When plaques or pearls obscure the visual axis, Nd:YAG laser capsulotomy is often used to create a clear opening. Capsular phimosis from anterior epithelial overgrowth may need surgical relaxing incisions or ring devices. Controlling postoperative inflammation with appropriate drops can limit further growth. In rare severe cases with marked capsule distortion and lens tilt, intraocular lens exchange and capsular reconstruction are considered.

FAQs About Lens Epithelial Hyperplasia

Is lens epithelial hyperplasia the same as posterior capsule opacification?

Posterior capsule opacification often involves lens epithelial cell proliferation and migration, so hyperplasia is one of its underlying processes. The term hyperplasia describes the cell behavior, while posterior capsule opacification describes the clinical result.

Can lens epithelial hyperplasia be prevented?

Complete prevention is not possible, but careful surgical technique, capsulorhexis sizing, and appropriate intraocular lens design reduce residual cell activity. Good control of inflammation after surgery also helps.

Will laser capsulotomy remove all hyperplastic cells?

Laser capsulotomy opens the central capsule to clear the visual axis but does not remove every cell. Residual tissue outside the opening usually does not disturb vision and is left in place.

Does lens epithelial hyperplasia damage the retina or optic nerve?

The changes are confined to the capsule and intraocular lens region. Visual effects come from light scatter and focus changes rather than direct damage to the retina or optic nerve.