Aphakia is a condition, where the crystaline lens of the eye is absent. It may be congenital or acquired. In such cases, the refractive power of the eye is reduced. This leads to a severe change in the optical state of the eye.
Key symptoms and effects:
Hyperopia - Vision is extremely blurry and both distance and near is unfocussed.
Loss of accomodation - Inability to switch between distance and near.
Faded colours - Colours appears to be white or faded.
Jack-in-the-box effect:
It is otherwise called as roving ring scotoma, typically occurs in thick, high powered, convex spectacle lenses. When looking through centre of the strong plus lens, the vision is clear. But in periphery of the lens, this creates a ring shaped blind spot. The objects seen through this can disappear and suddenly pops out. This is the phenomenon.
INTERVENTION:
Surgical implantation of Intraocular Lens(IOL)
Contact lenses- Special contact lenses can help to provide clear vision in babies who are too young for surgery.
Spectacle lenses
Babies and children with Aphakia needs treatment as soon as possible to reduce the risk of developing amblyopia( lazy eye)
Did you hear this kind of phenomenon in practice?
MBH/PS