ipl-logo

Pellucid Marginal Degeneration Research Paper

1295 Words6 Pages

INTRODUCTION. Pellucid Marginal Degeneration (PMD), also known as keratotorus [1], is a corneal ectasia that is often mistaken to be keratoconus, due to the similar features it shares [1, 2]. Pellucid Marginal Degeneration is a non-inflammatory disease that usually occurs bilaterally, however in some cases it may occur unilaterally [2]. Being a rare, progressive disorder, Pellucid Marginal Degeneration is characterised by the thinning of the inferior and peripheral portion of the cornea, although rarely the superior cornea may be involved [3]. This ocular pathology is presented between the ages of 20-40 years and causes a decline in visual acuity as a result of the irregular corneal shape. This may result in astigmatism. Distortion of vision …show more content…

The corneal thinning that occurs in Pellucid Marginal Degeneration is identified by 1- 2 mm of inferior peripheral thinning, spreading from the 4 o' clock to 8 o' clock positions [4]. This thinning represents the clinical feature of Pellucid Marginal Degeneration in view of it resembling a crescent shaped band [2]. The area of approximately 1-2 mm between the thinning cornea and the limbus remains unaffected and the centre of the cornea maintains its normal thickness [1,5]. The standard corneal sensation remains intact [6]. In some cases following corneal thinning, acute hydrops or corneal perforation may result. Abnormal corneal protrusion occurs above the region of thinning, this leads to irregular astigmatism. In Pellucid Marginal Degeneration the cornea is known as a "beer belly cornea". This is because the cornea has a more flattened shape and droops over the inferior limbus [2]. Pellucid Marginal Degeneration is differentiated from other corneal thinning disorders in that the area of thinning is avascular, without lipid deposition, clear, absence of corneal scarring and it lacks Rizutti's sign and Munson's sign

Show More
Related
1148 Words | 5 Pages

Keratoconus is a disease on the eye that doesn 't allow the patient to see beyond six inches. These patients only have the ability to see throughout one eye. This creates a one-sided perspective on the world, a one-sided view on humanity. A one-sided perspective could have a dangerous effect on a person 's mindset. Keratoconus is only apparent in about three in every two thousand people, although we continue to place ourselves in the same position.

Read More
679 Words | 3 Pages

In addition to breaking down collagen, UVA causes the fine wrinkles that appear around the eyes. It causes dark age spots, freckles, a general darkening around the eyes, and a crusty, scaly growth called actinic keratosis. Avoiding premature aging around the eyes, skin cancer, and eye problems such as cataracts and macular degeneration requires consistent UV protection every day when outdoors. You can either wear Nike prescription sunglasses (with 100% UV protection) when you're outdoors, or you can wear Nike prescription glasses with a lens material that naturally blocks all UV light. Two such materials are polycarbonate and Trivex.

Read More
490 Words | 2 Pages

Solar Keratosis is a common dermatologic sunny climates. It can also affect animals that live when they spend a great deal of time outside, even in temperate

Read More
1576 Words | 7 Pages

o 4. Inspection For organic problems o Hand magnifier and ophthalmascope c Check for external and internal ocular

Read More
320 Words | 2 Pages

When he was 16, he was diagnosed with Keratitis punctate, which causes the eye to become red, watery, sensitive to the light and decreases vision. This nearly ruined his vision. He underwent surgery that saved him from losing complete use of his eyes, but was left with very minimal eyesight.

Read More
1021 Words | 5 Pages

A 34 year old female presented to Ophthalmology outpatient department with complaints of diminished vision in both eyes more at night since 15 years. Diminution of vision was insidious in onset, gradually progressive and painless. There was no history of use of spectacles or hearing aids. No history of difficulty in walking. She was born out of a non consanginous marriage.

Read More
1238 Words | 5 Pages

The pre-ocular tear film-air interface is the principle refractive surface of the eye. The maintenance of stable quality tear film is of paramount importance with regard to good vision. Tear film consists of three layers. The most superficial layer of tear film is lipid layer, 0.11 µm thick produced by the meibomian glands. It serves to retard evaporation, allows smooth movements of the lids, prevents contamination of the tear film, and thickens and stabilizes the tear film.

Read More
1025 Words | 5 Pages

This is due to the vision difference between the two eyes and the fact that the healthy eye has a clear picture typically. The child is not used to the blurry image and cannot see therefore will struggle and whine until their healthy eye is uncovered. Refractive amblyopia may result from anisometropia which is an unequal refractive error between the two eyes. This can be caused if one eye is nearsighted (myopia) and the other is not, if one eye is farsighted (hyperopia) and the other is not, or astigmatism, which is the irregular curvature of the cornea, at a young age. This can also occur if one eye has more of a refractive error than the other has.

Read More
997 Words | 4 Pages

This procedure can be done in a number of ways including transconjunctival blepharoplasty, where an incision is made on the interior of the eyelid and excess tissue and fat is removed, leaving no external, visible scar. Lower lid lift is also done via incision just below the lash line so excess skin can be removed as well. Upper blepharoplasty is done to correct heavy, drooping eyelids and involves incisions made in the eyelid crease in order to remove excess skin, and the removal of fat and extra tissue in the lids. Occasionally a brow lift will be done in conjunction with eyelid surgery as well, especially if the brow is adding to the amount of droop occurring with the upper eyelids. Laser blepharoplasty is the lower lid procedure done with a surgical laser instead of an actual scalpel.

Read More
537 Words | 3 Pages

Blepharoplasty Many people develop the “tired eyes” look because of age or heredity. Most people refer to this condition as baggy eyelids, saggy eyelids, droopy eyelids and/or puffy eyelids. Excess skin and bulges of the upper and/or lower eyelids can cause a person to look tired, angry, or old. The medical term for the procedure to improve puffy eyelids, droopy eyelids, eye bags or baggy eyelids is blepharoplasty. Non-medical individuals may call this procedure eyelid surgery, an eye lift, an eyelid lift, cosmetic eyelid surgery, surgery, or treatment for puffy eyelids.

Read More
315 Words | 2 Pages

Differential diagnoses The differential diagnoses for patient are bacterial conjunctivitis, allergic conjuntivities and chalazion. Bacterial conjunctivitis is an inflammation of the bulbar and or palpebral conjunctivas, include staphylococci, streptococci, gonococci and chlamydia that can cause eye redness (Suto, Marinaga, Yagi, Tsuji & Toshida, 2012). Allergic conjunctivitis is eye inflammation resulting from an allergic reaction to substances like pollen or mold spores. When itchy and watery (Hom, Nguyen & Bielory, 2012). Chalazion is caused by the oil in the gland becoming too thick to flow out of the gland or the opening of the gland being obstructed, without anywhere to go, the oil builds up inside the gland and forms a lump in theyelid

Read More
929 Words | 4 Pages

Cataract Lakiedra Davis Mrs. Cauley EMBC 4/19/2016 Abstract Cataract development is a very gradual process of normal aging but can occasionally occur rapidly. Many people are unaware that they have cataracts because the changes in their vision have been so gradual. Cataracts commonly affect both eyes, but it is not uncommon for cataracts in one eye to advance more rapidly. Cataracts are very common, Experts have estimated that visual disability associated with cataracts accounts for over 8 million physician office visits a year in the United States.

Read More
936 Words | 4 Pages

This patient’s speech is clear and the responses appropriate to the verbal command. Next, I will access the eyes. Are the pupils equal, round, and reactive to light with accommodation? Abnormal pupil would be large, abnormal shape, with no reaction to light. Does she use glasses, contact lenses, or implants.

Read More
1260 Words | 6 Pages

This patient’s speech is clear and the responses appropriate to the verbal command. Next, I will access the eyes. Are the pupils equal, round, and reactive to light with accommodation? The abnormal pupil would be large, abnormal shape, with no reaction to light. Does she use glasses, contact lenses, or implants?

Read More
525 Words | 3 Pages

Due to a genetic defect, my retina never fully developed in utero leaving a large hole in the back of my right eye. The affected areas of my eye include the retina and macular, two main components of the science behind sight. In most cases when children are born with this particular disorder, it involves

Read More

More about Pellucid Marginal Degeneration Research Paper

Open Document