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    Aphakia is the absence of the lens of the eye, due to surgical removal, such as in cataract surgery, a perforating wound or ulcer, or congenital anomaly. It causes a loss of ability to maintain focus (accommodation), high degree of farsightedness (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 a congenital cataract. 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.


    Causes


    Surgical removal of a lens, mainly in cataract surgery, is the most common cause of aphakia. Spontaneous traumatic absorption or congenital absence of lens matter is rare. Traumatic subluxation or dislocation of a lens may cause it.


    Signs and symptoms


    Hypermetropia: Without the focusing power of the lens, the eye becomes very farsighted.
    Loss of accommodation: Since the lens and its zonules are responsible for adjusting the focus of vision to different lengths, patients with aphakia will have a total loss of accommodation.
    Defective vision: High degree hypermetropia and total loss of accommodation cause defective vision for both distance and near.
    Cyanopsia: Absence of lens cause cyanopsia or blue vision. Some individuals have said that they perceive ultraviolet light, invisible to those with a lens, as whitish blue or whitish-violet.
    Erythropsia: Sometimes, objects appear reddish.
    Deep anterior chamber: Since the lens is absent, anterior chamber will be deep.
    Iridodonesis: Iridodonesis is the vibration or agitated motion of the iris with eye movement.
    Purkinje test shows only two images; the reflection from anterior and posterior corneal surfaces.
    Iridectomy mark may be seen in surgical aphakia.
    Astigmatism: With-the-rule astigmatism due to corneal wound healing may occur in surgical aphakia, mainly after intracapsular cataract extraction or extracapsular cataract extraction.


    = Complications

    =
    Main complications of surgical aphakia include:

    Spectacle intolerance: Due to image magnification (up to 30%), optical aberration, prismatic effect and roving ring scotoma, spectacles are not well tolerated by aphakic patients. Due to unequal refractive power between the eyes, wearing spectacles with single-eye aphakia may cause double vision.
    Glaucoma: Secondary angle closure glaucoma may occur due to vitreous prolapse.
    Retinal detachment
    Aphakic bullous keratopathy


    Treatment


    Aphakia can be corrected by wearing glasses or contact lenses, by artificial lens implantation, or by refractive corneal surgeries. Eyes with artificial lenses are described as "pseudophakic".


    Etymology


    From Ancient Greek a-, privative prefix + phakós, lentil, anything shaped like a lentil, e.g. a lens, via New Latin.


    References




    External links

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Aphakia - www.medicoapps.org

Aphakia - www.medicoapps.org

Aphakia Symptoms | Treatment for Aphakia - SIMS Hospital Chennai

Aphakia Symptoms | Treatment for Aphakia - SIMS Hospital Chennai

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Aphakia: What It Is, Causes, Symptoms & Treatment - Cleveland Clinic

Sep 16, 2022 · Aphakia refers to having no lens in your eye. Pseudophakia refers to having an intraocular lens (IOL) placed in your eye. This usually happens when lenses with cataracts are removed during surgery. Cataracts make your lenses cloudy or filmy. Who does aphakia affect?

What Is Aphakia? - American Academy of Ophthalmology

Dec 10, 2021 · Aphakia means not having a lens inside your eye. The lens is the clear, oval-shaped structure behind the iris (colored part of your eye) and pupil . It focuses light rays on the retina.

Aphakia - Wikipedia

Aphakia is the absence of the lens of the eye, due to surgical removal, such as in cataract surgery, a perforating wound or ulcer, or congenital anomaly. It causes a loss of ability to maintain focus (accommodation), high degree of farsightedness (hyperopia), [1] and …

What Is Aphakia? - WebMD

Sep 3, 2024 · Aphakia is a condition in which you're missing the lens of one or both of your eyes. You can be born that way or lose the lens due to an injury. Or your doctor might remove it during an operation...

Congenital primary aphakia | About the Disease | GARD

Congenital primary aphakia (CPA) is a rare eye condition that is present at birth in which the lens is missing. In some cases, CPA can be associated with other eye abnormalities including microphthalmia, absence of the iris, anterior segment aplasia, and/or sclerocornea (when the cornea blends with the sclera).

Aphakia: Symptoms, Causes & Treatment | MyVision.org

Mar 15, 2023 · Aphakia is a condition in which there is no lens within the eye. The lens is the clear, ovular-shaped structure located behind the colored part of the eye (the iris) and the pupil. The lens plays a role in focusing light on the retina.

What is Aphakia? Causes, Symptoms, and Treatment Options

Jan 16, 2025 · Aphakia is the absence of the lens on either or both eyes after one undergoes its surgical removal. It can happen post-cataract or removal of any perforating wound or ulcer via a congenital anomaly. 3.

Aphakia: Causes, Symptoms and Treatment - Medicover Hospitals

Aphakia refers to the absence of the natural lens in the eye. The lens is crucial for focusing light onto the retina, enabling clear vision. Without the lens, the eye cannot properly focus light, leading to blurred vision and other visual disturbances.

Advances in the Management of Aphakia - PMC - PubMed …

Aphakia is a condition in which the crystalline lens of the eye is not present in its normal position following surgical removal, perforating injury, congenital anomaly, or dislocation of the lens. It causes loss of accommodation, high hyperopia, and anisometropia.

Pediatric Aphakia And Where To Place An Intraocular Lens

In our busy CHOP Ophthalmology practice, we see many aphakic (an eye without the natural crystalline lens) children. Most were infants born with congenital or infantile cataracts who had their cloudy lens removed to clear the visual axis in the first few months of life.