Hyperopia also known as farsightedness, and presbyopia are two distinct vision problems that, although both may cause blurred vision, differ significantly in their causes, age distribution, symptoms, and correction methods.
Hyperopia(Farsightedness)
Cause: Hyperopia occurs mainly due to an excessively short axial length of the eye (short eyeball) or weakened refractive power of the eye, causing distant objects to form images behind the retina rather than directly on it.
Age Distribution: Hyperopia can occur at any age, including in children, adolescents, and adults.
Symptoms: Both near and distant objects may appear blurred, and may be accompanied by eye fatigue, headaches, or esotropia.
Correction Method: Correction usually involves wearing convex lenses to enable light to focus correctly on the retina.
Presbyopia
Cause: Presbyopia occurs due to aging, where the lens of the eye gradually loses its elasticity, resulting in a decreased accommodative ability of the eye to focus clearly on nearby objects.
Age Distribution: Presbyopia mainly occurs in middle-aged and elderly populations, and almost everyone experiences it as they age.
Symptoms: The main symptom is blurred vision for near objects, while distant vision is usually clear, and may be accompanied by eye fatigue, eye swelling, or tearing.
Correction Method: Wearing reading glasses (or magnifying glasses) or multifocal glasses, such as progressive multifocal lenses, to help the eye focus better on nearby objects.
In summary, understanding these differences helps us better recognize these two vision problems and take appropriate measures for prevention and correction.
Post time: Dec-05-2024