Pterygium Classification

by admin on May 9, 2012

Before explaining pinguecula solution, we will explain also about the “close friend”, namely: pterygium. So that later you are not confused anymore when receive an explanation from your doctor about these two terms, namely: pinguecula and pterygium.
The term pingueculitis is a form of inflammation or acute inflammation of pinguecula.

Both pinguecula and pterygium, both are forms of abnormality or degeneration of the conjunctiva (the membrane or a transparent membrane lining the eyeball).

Symptoms:
1. Usually without symptoms (asymptomatic).
2. In many cases a cosmetic problem.
3. Decrease in vision (decreased vision) occurs if the pterygium is close to the axis of eye sight or visual axis.

Signs:
* Pinguecula very common, harmless, usually bilateral (on both eyes).

* Pinguecula usually appear on the bulbar conjunctiva adjacent to nasal limbus (the edge / side of the nose) or temporal limbus. There is a layer of yellow-white (yellow-white deposits), shapeless (amorphous).

* Pterygium is a fold of conjunctiva and tissue fibrovaskular triangular (triangular-shaped fold), which advanced to the surface of the cornea, is almost always preceded by pinguecula.

* Pterygium typically occurs in those who long lived in the climate (temperate) shows the response to heat and drought chronic (long) and exposure to ultraviolet light.

Classification Pterygium:

Type 1: extends less than 2 mm above the cornea. Heap of iron (shown by Stocker line) can be seen in the anterior corneal epithelium / front of the pterygium. Lesion / lesion was asymptomatic, although intermittent can become inflamed (intermittently inflamed). If you wear soft contact lense, symptoms may occur early due to large diameter lens that rests on the tip of the pterygium head slightly up / lift and this can cause irritation.

Type 2: widen to 4 mm of the cornea, can relapse (recurrent), so the need of surgery. Can disrupt the precorneal tear film and cause astigmatism.

Type 3: extending to more than 4 mm and involve areas of vision (visual axis). Lesion / lesion extensive (extensive), if relapse, may be associated with fibrosis subkonjungtiva and extends down to the fornix which sometimes can lead to limitation of eye movement.

Histology:
Pterygium consist of degenerative changes of collagen in the subepithelial stroma.

Cause:
Associated with exposure to sunlight, dust, wind (chronic irritation).

Epidemiology:
Common at age 20-30 years and in areas with tropical climates.

Prevention Pinguecula and Pterygium:
In general, protect the eyes from direct exposure to sunlight, dust and wind, for example by wearing sunglasses.

Solution (Treatment):
Pinguecula
Usually not required medication or special treatment. Except if it is acute inflammation or inflammation called pingueculitis, then given weak steroid, such as: fluorometholone.

Pterygium
Artificial tear drops (artificial tears), mild topical vasocontrictor, or mild topical steroid if there is inflammation. Highly recommended to wear glasses to reduce exposure to ultraviolet.

Pterygium surgery is indicated in type 2 and 3.

Diagnosis (differential diagnosis) Pinguecula and Pterygium:
Some conditions or circumstances that are similar or like both of them include:

1.Conjunctival intraepithelial neoplasia
2.Dermoid
3.Pannus

Complications Pinguecula and Pterygium:

1.Cataract
2.Visual loss
3.Scleral necrosis
4.Persistent epitheliel defect
5.Pingueculitis
6.Dellen formation adjacent to pingueculae
7.Corneal scaring: with pterygium

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UV light and eyes facts

by admin on May 9, 2012

  • Cataract, macular degeneration, ptergium, pinguecula, photokeratitis and cancers of the eyelids are linked to UV exposure
  • The highest ultraviolet exposure occurs during light overcast conditions where the horizon is visible and ground surface reflection is high (such as snow covered conditions).
  • In snowy conditions, ultraviolet rays are reflected upward, hitting you from above and below.  Up to 85% of ultraviolet rays may be reflected up into your eyes.
  • Ultraviolet is more damaging at higher altitudes because the air filters out about 4% less radiation for every 1,000 feet above sea level.  At 5,000 feet, a typical elevation forU.S.ski resorts, you are exposed to 20% more ultraviolet radiation.
  • Exposure to ultraviolet in childhood may be more damaging than exposure in adulthood.
  • Outdoor workers frequently are exposed to ultraviolet levels that are above the current safe exposure limits.
  • The risk of all sunlight-related eye diseases can be diminished by use of eye wear that absorbs ultraviolet radiation during exposure to sunlight.
  • Contact lens wearers should additionally wear sunglasses.
  • Certain drugs may make the eyes more sensitive to light.  Be sure to read drug labels and take appropriate precautions.
  • Wearing sunscreen on the face and around the eyes adds another layer of protection against ultraviolet light.
  • It is important to never look directly at the sun, or even to look at reflections of the sun off of water, ice, or snow, as this can directly damage the retina.
  • Intra-ocular lens implants after cataract surgery often include a substantial ultraviolet filter.  Nevertheless, sunglasses will protect the parts of the eye not protected by the implants.
  • Snow reflects more ultraviolet radiation than any other surface.
  • High exposure to ultraviolet can cause a corneal burn within one hour, although symptoms may not appear for six to 12 hours

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