-
The British Journal of Ophthalmology Apr 1995
Topics: Cell Division; Humans; Pterygium
PubMed: 7742271
DOI: 10.1136/bjo.79.4.304 -
The Israel Medical Association Journal... Jan 2000Previous work has suggested an association between increasing size of pterygium and increasing degrees of induced corneal astigmatism.
BACKGROUND
Previous work has suggested an association between increasing size of pterygium and increasing degrees of induced corneal astigmatism.
OBJECTIVES
To assess the quantitative relation between pterygium size and induced corneal astigmatism using a computerized corneal analysis system (TMS II) and slit-lamp beam evaluation of pterygium size, and to conclude whether corneal astigmatism is an early indication for surgical intervention.
METHODS
We evaluated 94 eyes of 94 patients with unilateral primary pterygium of different sizes, using TMS II and slit-lamp beam measurements of the size of the pterygium (in millimeters) from the limbus to assess parameters of pterygium size with induced corneal astigmatism. Best corrected visual Snellen acuity was performed.
RESULTS
Primary pterygium induced with-the-rule astigmatism. Pterygium extending > 16% of the corneal radius or 1.1 mm or less from the limbus produced increasing degrees of induced astigmatism of more than 1.0 diopter. Significant astigmatism was found in 16.16% of 24 eyes with pterygium of 0.2 up to 1.0 mm in size, in 45.45% of 22 eyes with pterygium of 1.1 up to 3.0 mm in size (P < or = 0.0004), and in 100% of 3 eyes with pterygium of 5.1 up to 6.7 mm in size (P = 0.0005). We found that visual acuity was decreased when topographic astigmatism was increased.
CONCLUSIONS
When primary pterygium reaches more than 1.0 mm in size from the limbus it induces with-the-rule significant astigmatism (> or = 1.0 diopter). This significant astigmatism tends to increase with the increasing size of the lesion. Topographic astigmatism tends to be improved by successful removal of the pterygium. These findings suggest that early surgical intervention in the pterygium may be indicated when the lesion is more than 1.0 mm in size from the limbus.
Topics: Astigmatism; Case-Control Studies; Corneal Topography; Humans; Pterygium
PubMed: 10892364
DOI: No ID Found -
JAMA Ophthalmology Oct 2022
Topics: Humans; Pterygium; Artifacts; Diagnostic Imaging; Neoplasms
PubMed: 36074444
DOI: 10.1001/jamaophthalmol.2022.3444 -
Nihon Rinsho. Japanese Journal of... Sep 2006
Review
Topics: Diagnosis, Differential; Humans; Orthopedic Procedures; Oxygen Inhalation Therapy; Physical Therapy Modalities; Prognosis; Pterygium; Syndrome
PubMed: 17022581
DOI: No ID Found -
Indian Journal of Ophthalmology Sep 2021This study aimed to evaluate the surgical outcomes of pterygial excision for primary and recurrent pterygia by a single method of pterygia excision combined with two...
PURPOSE
This study aimed to evaluate the surgical outcomes of pterygial excision for primary and recurrent pterygia by a single method of pterygia excision combined with two conjunctival flaps.
METHODS
This retrospective study divided 193 cases of pterygium into the primary (140 cases) and recurrent (53 cases) pterygium groups. Following double-sliding conjunctival transposition flap operation and surgical excision of the pterygium, the success and recurrence rates of pterygial surgery were assessed based on visual acuity and corneal and total astigmatism during follow-up at least 6 months.
RESULTS
Both primary and recurrent pterygium groups showed significant improvements in visual acuity and astigmatism (corneal and total) between before and after this procedure. Total astigmatism and success rate of primary pterygium were significantly better than those for recurrent pterygium. Two cases (1.4%) of primary pterygium and four cases (7.5%) of recurrent pterygium developed recurrence, corresponding to a rate of 3.1% (6/193 cases). The success rates significantly make a difference between primary and recurrent groups but did not differ significantly between the first recurrent and over twice recurrent pterygium. However, visual acuity, cornea, and total astigmatism improved significantly after surgery in first recurrent group but not in over twice recurrent group.
CONCLUSION
The double-sliding conjunctival flaps surgery appeared to be a useful method, with a better success rate and lower pterygial recurrence in pterygium surgery. Especially, when pterygium is larger or recurrent type, this technique can be easily covered the bare sclera, as compared to any transposition conjunctival flap operation.
Topics: Conjunctiva; Humans; Ophthalmologic Surgical Procedures; Pterygium; Retrospective Studies; Treatment Outcome
PubMed: 34427232
DOI: 10.4103/ijo.IJO_2982_20 -
The British Journal of Ophthalmology Nov 1993
Review
Topics: Dust; Humans; Pterygium; Tears; Ultraviolet Rays
PubMed: 8280691
DOI: 10.1136/bjo.77.11.734 -
Vestnik Oftalmologii 2024Pterygium is a common inflammatory-proliferative disease characterized by the invasion of degeneratively altered fibrovascular tissue into the cornea. This literature... (Review)
Review
Pterygium is a common inflammatory-proliferative disease characterized by the invasion of degeneratively altered fibrovascular tissue into the cornea. This literature review analyzes the etiological factors and pathogenetic concepts of its development, describes modern methods of diagnostics and surgical treatment of pterygium, and pays particular attention to the assessment of structural and functional changes in the cornea occurring during the growth of pterygium and after its excision.
Topics: Pterygium; Humans; Ophthalmologic Surgical Procedures; Cornea; Conjunctiva
PubMed: 38739143
DOI: 10.17116/oftalma2024140022136 -
Der Ophthalmologe : Zeitschrift Der... Jun 2010The traditional concept of chronic UV exposure as a central factor in the pathogenesis of pterygium has been repeatedly confirmed by large epidemiological studies in... (Comparative Study)
Comparative Study Review
The traditional concept of chronic UV exposure as a central factor in the pathogenesis of pterygium has been repeatedly confirmed by large epidemiological studies in recent years. Despite its high prevalence in some regions and populations, pterygium is only rarely a cause of blindness. In addition to the latitude of residence, risk factors include years of working outdoors, increasing age and male gender. Regular wearing of adequate sun protection is an economical and simple prophylaxis with proven effect and is recommended, as well as public education, in particular to groups of people who exercise their profession outdoors.
Topics: Adult; Age Factors; Cross-Cultural Comparison; Cross-Sectional Studies; Eye; Eye Protective Devices; Female; Humans; Male; Middle Aged; Occupational Diseases; Pterygium; Radiation Injuries; Risk Factors; Sex Factors; Sunlight; Young Adult
PubMed: 20393731
DOI: 10.1007/s00347-009-2101-3 -
The Ocular Surface Jan 2008Pterygium is a disease of the ocular surface that is associated with chronic UV exposure and is characterized by proliferation, inflammatory infiltrates, fibrosis,... (Review)
Review
Pterygium is a disease of the ocular surface that is associated with chronic UV exposure and is characterized by proliferation, inflammatory infiltrates, fibrosis, angiogenesis and extracellular matrix breakdown. Although pterygium is not fully understood, significant progress has been made toward understanding the mechanisms involved in its pathogenesis. In this review, we provide an update on the signaling pathways activated by UV light that result in induction of mediators responsible for the growth of pterygium. We also review the recent genetic studies on hereditary factors and provide a brief overview of the role of epithelial mesenchymal transition, bone marrow progenitor cells, and neuronal signals that may also contribute to the pathogenesis of pterygium. Therapeutic options for pterygium are discussed based on the mechanisms that perpetuate its growth.
Topics: Angiogenesis Inhibitors; Animals; Humans; Neovascularization, Pathologic; Ophthalmologic Surgical Procedures; Pterygium; Treatment Outcome
PubMed: 18264653
DOI: 10.1016/s1542-0124(12)70103-9 -
Ophthalmologica. Journal International... 1977The incidence of pterygium in Qatar is 6.2%, which is less than expected. Laying stress on the climatic conditions, the etiological factors have been discussed. 450...
The incidence of pterygium in Qatar is 6.2%, which is less than expected. Laying stress on the climatic conditions, the etiological factors have been discussed. 450 cases of pterygia were operated on by a modified bare scleral technique followed by beta-irradiation. No recurrence occurred in 90% following the first operation. The final good result (98.8%) is in favour of the adopted surgical technique and post-operative care.
Topics: Adolescent; Adult; Age Factors; Aged; Child; Climate; Female; Humans; Male; Middle Aged; Pterygium; Qatar; Sex Factors
PubMed: 857219
DOI: 10.1159/000308582