Presbyopia

When nearby objects become blurry
and eye fatigue sets in

Presbyopia develops when the lens loses elasticity and the ciliary muscle
that controls focus weakens, causing nearby objects to
appear blurry.
With age, the lens stiffens and its refractive flexibility
diminishes,
while weakened ciliary muscles further impair
near vision.

Presbyopic vision
Normal vision
Normal vision
Presbyopic vision

Symptoms of Presbyopia

As the eye's focusing ability weakens,
various visual discomforts may appear in daily life.

Near Vision Decline

Near Vision Decline

Small text on mobile phones, newspapers, and books
appears blurry.

Dim Vision

Dim Vision

Symptoms worsen in dimly lit
environments,
and eyes tire easily with a dry, gritty feeling.

Delayed Focus Transition

Delayed Focus Transition

When switching from looking far away to nearby,
or vice versa, it takes time for focus to adjust.

Headaches and Eye Pain

Headaches and Eye Pain

Forcing the eyes to focus can cause pain around the eyes or headaches as a result.

Stages of Presbyopia

Presbyopia can be broadly divided into
four stages based on the degree of accommodation loss.

Stages of presbyopia
1

Early Presbyopia

Typically appears in the early 40s, with
a noticeable delay in focus transition
when alternating between far and near objects.

2

Progressive Presbyopia

Around age 45, you may find yourself
holding your phone or book farther away, and near-distance tasks become
practically difficult without reading glasses.

3

Mature Presbyopia

After the 50s, the lens loses significant elasticity,
and not only near but intermediate distance (computer monitor, etc.) vision also becomes blurry.

4

Advanced Presbyopia

Mainly occurs in those over 60, where accommodative function is nearly lost and strong correction is essential
for all near-distance activities.

Presbyopia Self-Check

Small daily discomforts may be signs of presbyopia.
Check your eye health with this self-diagnosis.

Dim Vision

When looking at a smartphone or book,
you unconsciously hold it farther away.

Slow Focus Transition

When switching from far to near objects,
it takes time for your eyes to focus.

Eye Fatigue

Near-distance tasks are hard to sustain for more than 10 minutes,
and eyes quickly feel dry or heavy.

Headaches and Eye Pain

After detailed work, the area around the eyes
aches or mild headaches occur.

Vision Changes

As the day progresses, eyes feel dimmer
and blurry vision symptoms worsen.

Daily Inconvenience

Precise tasks like threading a needle
or clipping nails have become harder than before.

Cataract

When the naturally clear lens becomes cloudy and opaque

Cataract is a condition in which the eye's lens loses its transparency and becomes cloudy,
causing vision impairment.
As you age, the proteins that make up the lens
denature and can no longer properly transmit light, resulting in foggy
vision and overlapping images.

Cataract vision
Normal vision
Normal vision
Cataract vision

Symptoms of Cataract

Cataract may cause a foggy, uncomfortable field of vision
along with various visual discomforts.

Vision Decline

Vision Decline

The entire field of vision appears foggy and uncomfortable, as if covered in mist.

Glare

Glare

Due to lens opacity,
severe glare is felt when
light enters directly.

Double Vision

Double Vision

Even with one eye, objects appear as two or more overlapping
images, a phenomenon called diplopia.

Day Blindness

Day Blindness

Objects are seen better in dark places where the pupil dilates
than in bright daylight or strongly lit environments.

Types and Causes of Cataract

While aging is the most common cause of cataract,
it can also occur due to other factors.

Types and causes of cataract
1

Senile Cataract

The most common form,
caused by denaturation of
lens proteins with aging.

2

Traumatic Cataract

Occurs when the lens is damaged
by strong impact or a sharp object.

3

Complicated Cataract

Caused by severe eye diseases like uveitis
or glaucoma, or systemic conditions like diabetes.

4

Congenital Cataract

Present from birth with lens opacity,
caused by genetic factors or prenatal infections.

Frequently Asked Questions

Gangnam Tokyo Eye Clinic answers your questions about cataracts.

Gangnam Tokyo Eye Clinic