LASIK Eye Surgery by animation

What is LASIK?

Procedure uses computer controlled laser to reshape cornea

Surgical procedure to correct

Myopia
Hyperopia
Astigmatism

What Preparations Are Needed?

Analysis of eye pressure, shape of cornea, thickness of cornea

Schedule eye exam to determine
Health of the eyes
Current vision

Set appointment for surgery

Make financial arrangements

What Does LASIK Involve?

Patient is given sedative and eye is anesthetized

Computer-guided scalpel cuts thin layer (flap) of cornea

Flap is lifted and moved to the side

Laser is carefully aligned over cornea

Computer-controlled laser burns away tissue to reshape cornea

Flap is returned to original position

Patient is observed for 1 hour and needs assistance driving home

Amblyopia, Or , lazy eye

Amplyopia is the loss of Vision In One or both eye

Symptoms:

Eyestrain
Overall poor visual acuity
Squinting or completely closing one eye to see
Headaches

Causes:

Trauma
strong uncorrected refractive error
strabismus


Amplyopia Stages :



Normal Vision: Both Eyes Look At An Object At The Same Time &Each Send Apicture To The Brain
The Two Picture Are Blended into ONE Image ( FUSION)1


One Eye Is Weaker Than The Other
Both Eye Do not Focus On one Object
As Aresult ,Two Different Images Sent To The Brain
One Is Clear , While The Other Is Blurred
Brain is unable to blend The two picture into One
As aresult , patient learn to ignore the blurry picture ( SUPPRESSION)2


When left Uncorrected , Week ( Blurry) eye will develop Loss of vision or ( AMPLYOPIA)3

Treatment :

- Treat the cause

- Then Amplyopia Is treated by :Forcen the weaker eye

through patching the Clear eye

Retinal Tears and Detachments

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Flashing lights and floater

The flashing lights are caused by the vitreous gel pulling on the retina or a looseness of the svitreous, which allows the vitreous gel to bump against the retina

The floaters are caused by condensations (small solidifications) in the vitreous gel and described by patients as spots, strands, or little flies

flashing lights and floaters may often be unassociated with a tear or detachment and can merely result from a separation of the vitreous gel from the retina.

This condition is called a posterior vitreous detachment PVD

also , notice

Blurred Vision

Another sign is seeing a shadow or a (curtain )coming down from the top of the eye or across from the side.

Diabetic retinopathy

In Diabetic retinopathy Search For :

microaneurysms

(They are small areas of balloon-like swelling in the retina's tiny blood vessels. )

This Is :

Mild Nonproliferative Retinopathy

Attenuated blood vessels

This Is :

Moderate Nonproliferative Retinopathy

Ischamia:blocked blood vessels

depriving several areas of the retina with their blood supply. These areas of the retina send

signals to the body to grow new blood vessels for nourishment.

This Is :

Severe Nonproliferative Retinopathy

Neovascularization

the signals sent by the retina for nourishment trigger the growth of new blood vessels. This condition is called prliferative diabetic retinopathy.

These new blood vessels are abnormal and fragile. They grow along the retina and along the surface of the clear, vitreous gel that fills the inside of the eye. By themselves, these blood vessels do not cause symptoms or vision loss. However, they have thin, fragile walls. If they leak blood, severe vision loss and even blindness can result.

ADIE'S PUPIL

Adie syndrome charachterized by three hallmark symptoms :

- anisocoria
- loss of deep tendon reflexes and diaphoresis
- hyperopia


It is caused by damage to the postganglionic fibers of the parasympathetic innervation of the eye, usually by a viral or bacterial infection which causes inflammation, and characterized by a tonically dilated pupil.