Ogbonge doctor wey dey use Facebook dey educate kontri people on different health mata, Dr. David Okorafor don throw light on eye problem oyinbo call PRESBYOPIA. He post about dis eye wahala on Facebook dey yan people wey don reach 40 years and above say make dem no worry if dem need to carry book go front before fem go fit read am. He say na normal thing, as pesin dey old, some changes for im eyes fo make am no dey see well like before.
You fit read di post of Dr. Okorafor wey be di Founder of Roadside Medical Education as he take write am with plenty grammar.
Some people suddenly find out that they can no longer read fine prints unless they hold the page backwards, away from their face.
For an individual we may not be sure of their age, this habit is a strong pointer that they’re at least 40 years old. They are having presbyopia.
Presbyopia is age-related far-sightedness, which is almost an entitlement for crossing 40. What really happens in presbyopia?
To answer this question, we first need to understand how the natural lenses of our eyes work.
A lens is a biconvex (i.e almond-shaped), glass-like structure in the frontal part of the eyeball or globe. It is glass-like in that it is transparent; it is not in any way comparable to real glass in rigidity.
The function of the lens is to receive the rays of light passing through our eyes, and focus them properly on the light-sensitive coat or retina at the back of the globe for clear vision.
How is the able to do this?
The lens is suspended in position by some ligaments which are themselves attached to the ciliary muscle, a kind of smooth muscle firmly anchored to the inside wall of the globe.
Because of the ligaments and muscles harnessed to the lens, the lens will change shape with the contraction and relaxation of the muscle.
This change in the shape of the lens depends on the distance from which light of what we want to see is coming.
If the object is near, the lens gets a bit rounder to focus the rays on the retina. Conversely, it gets flatter when we want to visualize far objects.
This natural process of the lens changing shape for better focusing of light for the clearest vision is known as accommodation.
With aging, the ligaments and muscle attached to the lens become weak and less active, and the lens tends to remain more flat than round. Remember flat is the configuration for far sight.
Besides, although the lens is transparent, its capsule contains a gel-like kind of mixture of water and some special proteins.
These proteins undergo some degree of degeneration with age. When this happens, the lens becomes less elastic and pliant. That means accommodation is no longer easy.
The untoward synergy between aging lenses and muscles and ligaments more or less reconfigures the lenses for far vision.
So, this is why ‘old’ people tend to see far objects better than near ones. This is presbyopia, and now you know how it arrives.
Remedy? Reading glasses, contact lenses, surgery. Choice depends on one’s particular or unique need for their sight.
An academic presbyope is more likely to get a pair of reading glasses than a presbyopic poultry farmer who still sees his birds very clearly.