Frequency doubled Nd :YAG (532 nm) laser photocoagulation in corneal vascularisation : efficacy and time sequenced changes.
PURPOSE: To evaluate the efficacy of frequency-doubled Nd:YAG (532 nm) laser treatment in quiescent corneal vascularisation, and to record the sequential changes in lasered vessels and complications in eyes with one and two quadrant vascularisation. METHODS: Thirty eyes (30 patients)--15 eyes (15 pa...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Wolters Kluwer Medknow Publications
2001-01-01
|
Series: | Indian Journal of Ophthalmology |
Subjects: | |
Online Access: | http://www.ijo.in/article.asp?issn=0301-4738;year=2001;volume=49;issue=4;spage=235;epage=40;aulast=Sharma |
id |
doaj-a0ce32857930423f82a387e8a121a944 |
---|---|
record_format |
Article |
spelling |
doaj-a0ce32857930423f82a387e8a121a9442020-11-24T21:42:48ZengWolters Kluwer Medknow PublicationsIndian Journal of Ophthalmology0301-47382001-01-0149423540Frequency doubled Nd :YAG (532 nm) laser photocoagulation in corneal vascularisation : efficacy and time sequenced changes.Sharma ASamal ANarang SGutpa ARam JGupta APURPOSE: To evaluate the efficacy of frequency-doubled Nd:YAG (532 nm) laser treatment in quiescent corneal vascularisation, and to record the sequential changes in lasered vessels and complications in eyes with one and two quadrant vascularisation. METHODS: Thirty eyes (30 patients)--15 eyes (15 patients) with one-quadrant and 15 eyes (15 patients) with two-quadrant corneal vascularisation were treated. Frequency-doubled Nd:YAG laser (532 nm) was used at laser setting of 120-480 mw power, 50-150 mm spot size and 0.05 sec pulse duration. The area of corneal vascularisation, status of treated corneal vessels, area of corneal opacity and visual acuity were recorded before treatment, at one week after treatment and thereafter at monthly intervals up to three months. RESULTS: The mean area of corneal vascularisation decreased from 20.09% to 8.31% of the total corneal area in group I (p<0.01) and from 44.34% to 20.67% of the total corneal area in group II (p<0.01) at 3 months′ follow-up. The mean reduction in the area of corneal vascularisation was 58.64% in group I and 53.38% in group II (p>0.05). Of 148 corneal vessels treated, 60 (44.6%) were totally occluded, 44 (30%) partially occluded, 37 (28%) recanalized and there was one shunt vessel at one week following laser treatment. At three months′ follow-up, 80 (54.15%) vessels were totally occluded, 14 (9%) partially occluded, 52 (35.14%) recanalised and two shunt vessels appeared. Thus, at three months′ follow-up, the number of totally occluded vessels increased and partially occluded vessels decreased. Superficial corneal haemorrhage was observed in 4 (14%) patients. CONCLUSION: Frequency-doubled Nd:YAG (532 nm) laser photocoagulation appears a safe and effective means of reducing the area of corneal vascularisation in quiescent eyes with vascularised corneal opacities.http://www.ijo.in/article.asp?issn=0301-4738;year=2001;volume=49;issue=4;spage=235;epage=40;aulast=SharmaAdultCataractcomplicationsCorneal NeovascularizationcomplicationspathologyphysiopathologysurgeryFemaleHumansLaser Coagulationadverse effects |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sharma A Samal A Narang S Gutpa A Ram J Gupta A |
spellingShingle |
Sharma A Samal A Narang S Gutpa A Ram J Gupta A Frequency doubled Nd :YAG (532 nm) laser photocoagulation in corneal vascularisation : efficacy and time sequenced changes. Indian Journal of Ophthalmology Adult Cataract complications Corneal Neovascularization complications pathology physiopathology surgery Female Humans Laser Coagulation adverse effects |
author_facet |
Sharma A Samal A Narang S Gutpa A Ram J Gupta A |
author_sort |
Sharma A |
title |
Frequency doubled Nd :YAG (532 nm) laser photocoagulation in corneal vascularisation : efficacy and time sequenced changes. |
title_short |
Frequency doubled Nd :YAG (532 nm) laser photocoagulation in corneal vascularisation : efficacy and time sequenced changes. |
title_full |
Frequency doubled Nd :YAG (532 nm) laser photocoagulation in corneal vascularisation : efficacy and time sequenced changes. |
title_fullStr |
Frequency doubled Nd :YAG (532 nm) laser photocoagulation in corneal vascularisation : efficacy and time sequenced changes. |
title_full_unstemmed |
Frequency doubled Nd :YAG (532 nm) laser photocoagulation in corneal vascularisation : efficacy and time sequenced changes. |
title_sort |
frequency doubled nd :yag (532 nm) laser photocoagulation in corneal vascularisation : efficacy and time sequenced changes. |
publisher |
Wolters Kluwer Medknow Publications |
series |
Indian Journal of Ophthalmology |
issn |
0301-4738 |
publishDate |
2001-01-01 |
description |
PURPOSE: To evaluate the efficacy of frequency-doubled Nd:YAG (532 nm) laser treatment in quiescent corneal vascularisation, and to record the sequential changes in lasered vessels and complications in eyes with one and two quadrant vascularisation. METHODS: Thirty eyes (30 patients)--15 eyes (15 patients) with one-quadrant and 15 eyes (15 patients) with two-quadrant corneal vascularisation were treated. Frequency-doubled Nd:YAG laser (532 nm) was used at laser setting of 120-480 mw power, 50-150 mm spot size and 0.05 sec pulse duration. The area of corneal vascularisation, status of treated corneal vessels, area of corneal opacity and visual acuity were recorded before treatment, at one week after treatment and thereafter at monthly intervals up to three months. RESULTS: The mean area of corneal vascularisation decreased from 20.09% to 8.31% of the total corneal area in group I (p<0.01) and from 44.34% to 20.67% of the total corneal area in group II (p<0.01) at 3 months′ follow-up. The mean reduction in the area of corneal vascularisation was 58.64% in group I and 53.38% in group II (p>0.05). Of 148 corneal vessels treated, 60 (44.6%) were totally occluded, 44 (30%) partially occluded, 37 (28%) recanalized and there was one shunt vessel at one week following laser treatment. At three months′ follow-up, 80 (54.15%) vessels were totally occluded, 14 (9%) partially occluded, 52 (35.14%) recanalised and two shunt vessels appeared. Thus, at three months′ follow-up, the number of totally occluded vessels increased and partially occluded vessels decreased. Superficial corneal haemorrhage was observed in 4 (14%) patients. CONCLUSION: Frequency-doubled Nd:YAG (532 nm) laser photocoagulation appears a safe and effective means of reducing the area of corneal vascularisation in quiescent eyes with vascularised corneal opacities. |
topic |
Adult Cataract complications Corneal Neovascularization complications pathology physiopathology surgery Female Humans Laser Coagulation adverse effects |
url |
http://www.ijo.in/article.asp?issn=0301-4738;year=2001;volume=49;issue=4;spage=235;epage=40;aulast=Sharma |
work_keys_str_mv |
AT sharmaa frequencydoubledndyag532nmlaserphotocoagulationincornealvascularisationefficacyandtimesequencedchanges AT samala frequencydoubledndyag532nmlaserphotocoagulationincornealvascularisationefficacyandtimesequencedchanges AT narangs frequencydoubledndyag532nmlaserphotocoagulationincornealvascularisationefficacyandtimesequencedchanges AT gutpaa frequencydoubledndyag532nmlaserphotocoagulationincornealvascularisationefficacyandtimesequencedchanges AT ramj frequencydoubledndyag532nmlaserphotocoagulationincornealvascularisationefficacyandtimesequencedchanges AT guptaa frequencydoubledndyag532nmlaserphotocoagulationincornealvascularisationefficacyandtimesequencedchanges |
_version_ |
1725916905496117248 |