What is the difference between pinguecula and pterygium?
A pinguecula is a raised yellowish white growth next to, but not overlapping, the cornea. This growth can be unsightly, but it typically does not cause any significant problems and does not need to be removed. A pterygium is a fleshy growth of the conjunctiva that spreads across onto the cornea.
What causes pterygium and pinguecula?
Pinguecula and pterygium are both caused by exposure to ultraviolet (UV) radiation, and made worse by chronic dryness or irritation.
What is the pathophysiology of pterygium?
The pathophysiology of pterygium is characterized by elastotic degeneration of collagen and fibrovascular proliferation, with an overlying covering of epithelium. Histopathology of the abnormal collagen in the area of elastotic degeneration shows basophilia with hematoxylin and eosin stain.
What is pterygium and its types?
Pterygium or Surfer’s eye is a degenerative condition of the conjunctiva that proliferates as a fibrovascular growth to invade the cornea. Pterygium or Surfer’s eye is referred to as a pinkish wing-shaped ocular surface lesion or a benign tissue growth onto the cornea.
How can you tell the difference between pterygium and Pseudopterygium?
A true pterygium has edges that can be elevated with forceps or under which a probe can be passed A true pterygium aries from a pinguecula. A pseudopterygium arises from destruction of the marginal, corneal epithelium through trauma, e.g. caustics, burns or inflammation.
Does pinguecula become pterygium?
Just like a pterygium, a pinguecula can irritate the eye and make it difficult to wear contact lenses. However, a pinguecula cannot grow across the cornea, and therefore will not affect vision. In some cases, a pinguecula can become a pterygium if it grows across the cornea.
What is the difference between pterygium and cataract?
Pterygium is a proliferative disorder, represented by a wing-shaped fibrovascular growth of the bulbar conjunctiva towards the cornea. Cataract is defined as an opacity or clouding of the lens of the eye that causes it to lose its transparency and/or scatter light.
How do you treat pterygium?
Surgery – is the only treatment that can remove a pterygium. Your optometrist or doctor may refer you to an eye surgeon. It is preferable to remove the pterygium before it grows across the cornea. Otherwise, it may scar the cornea and cause permanent vision problems.
What are parts of pterygium?
A pterygium has three parts: Cap – At the leading edge, which is distinguished by a halo-like avascular zone. Head – peripheral to the cap. Body – the main part of the pterygium communicating with the bulbar conjunctiva.
What is the treatment of pterygium?
Treating a pterygium can be done without surgical removal. Smaller growths are usually treated with artificial tears to lubricate the eyes or mild steroid eye drops that counteract redness and swelling.
What is probe test in pterygium?
Bowman’s probe test was helpful in differentiating the true pterygium from the pseudopterygium by the inability of the probe to insinuate freely underneath the body of the primary pterygium, due to its adherence to underlying episclera and the sclera throughout the extent of the growth.
What is the difference between cataracts and pterygium?
What is the difference between pterygium and pinguecula?
The main difference between pterygium and pinguecula is that pterygium invades the cornea to enter into the space that is usually occupied by the Bowman layer, but pinguecula does not have that invasive nature.
What is the best test for primary pterygium?
Purpose 40 eyes of 32 patients with primary pterygium was examined by slit lamp examination and IVCM in a prospective randomized double blind study. Eye Specialist Adelaide – How Does Pterygia Impact On Your Vision – There is no specific test designed to diagnose a pterygium.
What are the histologic changes in the pterygium?
Histologic changes in Pterygium Primary pterygium consists of stratified squamous epithelium of variable thickness 08/22/15 53. Histologic changes in Pterygium Subepithelial stroma consists of degenerated collagen fibrils, which are basophilic and can be stained by elastic tissue stain but do not get digested by elastase
What are the stages of ptergyium?
59. Stages of Ptergyium- Progressive- 1) thick, fleshy with prominent vascularity 2) gradually increasing in size and encroaching towards the centre of the cornea 3) opaque infilterative spot (cap) seen just infront of the apex of the pterygium 4) deposition of iron as a line (Stocker’s line) is seen in corneal epithelium infront of the apex. 60.