Compare the Difference Between Similar Terms

Difference Between

Home / Health / Medicine / Eye /结膜黄斑一个之间的区别d Pterygium

结膜黄斑一个之间的区别d Pterygium

August 22, 2017Posted byRanidu

Key Difference – Pinguecula vs Pterygium

Both Pinguecula and Pterygium are ophthalmological conditions characterized by the appearance of submucosal elevations on the conjunctiva. These are caused by actinic damages. Consequently, they are found in the areas of the conjunctiva that are mostly exposed to the sun such as the interpalpebralfissure.Pterygium originates in the conjunctiva on the either side of the limbus and invades the cornea to enter the space occupied by the Bowman layer. Although pinguecula also originates in the conjunctiva on the either side of the limbus it does not invade the cornea.This is the key difference between pinguecula and pterygium.

CONTENTS

1.Overview and Key Difference
2.What is Pterygium
3.What is Pinguecula
4.Similarities Between Pinguecula and Pterygium
5.Side by Side Comparison – Pinguecula vs Pterygium in Tabular Form
6.Summary

What is Pterygium?

Pterygium is a submucosal elevation on the conjunctiva that invades the cornea to enter the space usually occupied by the Bowmans layer. This submucosal growth is made of fibrovascular connective tissues. Pterygium does not cross the pupillary axis. Apart from mild astigmatism, it does not impair the vision significantly.

Pterygia are benign on most occasions, but sometimes they can be the precursorlesionsof malignancies such as actinic inducedsquamous cell carcinomasandmelanomas. Therefore it is advisable to carry out pathological investigations to exclude the possibility of any malignant conditions.

结膜黄斑一个之间的区别d Pterygium

Figure 01: Pterygium

When pterygia appear in both eyes those are called bilateral pterygia.

Causes

  • Excessive exposure to sunlight
  • Any condition that makes the eyes dry

Management

  • Usually, these can be controlled by eye drops.
  • Surgical excision is required only if the vision is obscured.

What is Pinguecula?

Pinguecula is a yellowish submucosal elevation that originates in the conjunctiva on the either side of the limbus. Unlike pterygium, pinguecula does not invade the cornea. But the presence of a focal conjunctival elevation near the limbus undermines the uniformity of the conjunctiva leading to the uneven distribution of the tear film. This increases the dryness in some areas of the conjunctiva, resulting in the shrinking of those regions, ultimately forming disc like depressions called the “delle”.

Causes and treatment of pinguecula are similar to those of pterygium.

Key Difference - Pinguecula vs Pterygium

Figure 02: Pinguecula

What are the Similarities Between Pinguecula and Pterygium?

  • Both conditions are characterized by the appearance of submucosal elevations on the conjunctiva.
  • Excessive exposure to sunlight is the commonest cause of both conditions.
  • Both conditions are managed in a similar manner.

What is the Difference Between Pinguecula and Pterygium?

Pinguecula vs Pterygium

Pinguecula is a yellowish submucosal elevation that originates in the conjunctiva on the either side of the limbus. Pterygium is a submucosal elevation on the conjunctiva that invades the cornea to enter the space occupied by the Bowman layer.
Cornea
This does not invade into the cornea. This invades the cornea.
Delle
This causes delle. This does not cause delle.

Summary – Pinguecula vs Pterygium

Pterygium and pinguecula are submucosal elevations on the conjunctiva arising as a result of the actinic damages following excessive exposure to sunlight. 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.

Download PDF Version of Pinguecula vs Pterygium

You can download PDF version of this article and use it for offline purposes as per citation note. Please download PDF version here结膜黄斑一个之间的区别d Pterygium.

References

1. Kumar, Vinay, Stanley Leonard Robbins, Ramzi S. Cotran, Abul K. Abbas, and Nelson Fausto. Robbins and Cotran pathologic basis of disease. 9th ed. Philadelphia, Pa: Elsevier Saunders, 2010. Print.

Image courtesy

1. “Pterygium Slitlamp” By Jmvaras José Miguel Varas, MD – Own work(CC BY 3.0)viaCommons Wikimedia
2. “PRE-OPERATIVE PINGUECULA” Di Red eye2008 – Opera propria (CC BY-SA 3.0)viaCommons Wikimedia

Related posts:

Difference Between Cataract and Glaucoma Difference Between Scleritis and EpiscleritisDifference Between Scleritis and Episcleritis

Filed Under:EyeTagged With:Compare Pinguecula and Pterygium,Pinguecula and Pterygium Differences,Pinguecula and Pterygium Similarities,结膜黄斑的原因,Pinguecula Definition,Pinguecula Management,Pinguecula vs Pterygium,Pterygium Causes,Pterygium Definition,Pterygium Management

About the Author:Ranidu

Ranidu is passionate about writing articles on medical topics in general parlance. His experience in communicating with the general public during his medical practice has enabled him to describe facts that a layman has to know about a particular disorder in a concise and understandable manner.

Leave a ReplyCancel reply

Your email address will not be published.Required fields are marked*

Request Article

Featured Posts

Difference Between Coronavirus and Cold Symptoms

Difference Between Coronavirus and Cold Symptoms

Difference Between Coronavirus and SARS

Difference Between Coronavirus and SARS

Difference Between Coronavirus and Influenza

Difference Between Coronavirus and Influenza

Difference Between Coronavirus and Covid 19

Difference Between Coronavirus and Covid 19

You May Like

Difference Between Luggage and Baggage

Difference Between Luggage and Baggage

宏达感觉4 g和摩托罗拉之间的区别trix 4G

Difference Between Retinoid and Retinol

Difference Between Retinoid and Retinol

Difference Between Council and Committee

Difference Between Precious and Semi Precious Stones

Difference Between Precious and Semi Precious Stones

Latest Posts

  • What is the Difference Between Cellulite and Lipedema
  • What is the Difference Between Kinetin and Zeatin
  • What is the Difference Between Benzoyl Peroxide and Benzyl Benzoate
  • What is the Difference Between Sebum and Sweat
  • What is the Difference Between L Carnitine and Acetyl L Carnitine
  • What is the Difference Between Orthostatic Hypotension and Vasovagal Syncope
  • Home
  • Vacancies
  • About
  • Request Article
  • Contact Us

Copyright © 2010-2018Difference Between. All rights reserved.Terms of Useand Privacy Policy:Legal.