Small optical zones with aspheric profiles in laser refractive surgery for myopia: A surgical outcome and patient satisfaction study

M Woodcock, S Shah, M Mandal, S Pieger, C Grills, Tara Moore

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Purpose: To assess the outcomes of small optical zone (OZ) ablations used in conjunction with largetransition zones (TZ) and a highly aspheric treatment profile.Methods: Interventional case series of 39 consecutive patients with myopia or myopic astigmatism.Patient data included pre and postoperative refraction and visual acuities, laser treatment settings andpre and postoperative corneal topography as well as questionnaire responses about the use of glassesand the quality of vision postoperatively.Results: The mean preoperative spherical equivalent was −4.50 ± 2.11 dioptres (D) and the mean OZ andTZ diameters were 4.5 ± 0.5 mm and 8.1 ± 0.4 mm, respectively. The mean patient age was 40.7 ± 10.4years. Manifest spherical refraction was within ±0.5 D in 87% of patients (±1.0 D in 99%) and cylindricalrefraction within 0.5 D in 79% (≤1.0 D in 95%). The need to wear distance glasses postoperativelywas associated with dissatisfaction with the quality of daytime vision (p = 0.05) and unhappiness withnight vision was associated with symptoms of halos (p = 0.03) and starbursts (p = 0.02). The proportionof patients reporting symptoms of dysphotopsias included: ghosting 0%; glare 2%; halos 10%; and starbursts15%. There was a significant difference in the measured mean effective OZ diameter (4.8 ± 0.3 mm)compared to the mean programmed OZ (4.5 ± 0.5 mm, p = 0.00).Conclusions: Small ablation zones, when used in conjunction with a large diameter TZ, do not lead to agreater incidence of unwanted visual phenomena over that reported by many studies with larger OZs
LanguageEnglish
Pages259-264
JournalContact Lens and Anterior Eye.
Volume36
Issue number5
Early online date17 Jun 2013
DOIs
Publication statusPublished - Oct 2013

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Refractive Surgical Procedures
Myopia
Laser Therapy
Patient Satisfaction
Glare
Corneal Topography
Astigmatism
Visual Acuity
Glass
Lasers
Incidence
Therapeutics

Keywords

  • Refractive SurgeryLASIKLASEKOptical aberrations

Cite this

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title = "Small optical zones with aspheric profiles in laser refractive surgery for myopia: A surgical outcome and patient satisfaction study",
abstract = "Purpose: To assess the outcomes of small optical zone (OZ) ablations used in conjunction with largetransition zones (TZ) and a highly aspheric treatment profile.Methods: Interventional case series of 39 consecutive patients with myopia or myopic astigmatism.Patient data included pre and postoperative refraction and visual acuities, laser treatment settings andpre and postoperative corneal topography as well as questionnaire responses about the use of glassesand the quality of vision postoperatively.Results: The mean preoperative spherical equivalent was −4.50 ± 2.11 dioptres (D) and the mean OZ andTZ diameters were 4.5 ± 0.5 mm and 8.1 ± 0.4 mm, respectively. The mean patient age was 40.7 ± 10.4years. Manifest spherical refraction was within ±0.5 D in 87{\%} of patients (±1.0 D in 99{\%}) and cylindricalrefraction within 0.5 D in 79{\%} (≤1.0 D in 95{\%}). The need to wear distance glasses postoperativelywas associated with dissatisfaction with the quality of daytime vision (p = 0.05) and unhappiness withnight vision was associated with symptoms of halos (p = 0.03) and starbursts (p = 0.02). The proportionof patients reporting symptoms of dysphotopsias included: ghosting 0{\%}; glare 2{\%}; halos 10{\%}; and starbursts15{\%}. There was a significant difference in the measured mean effective OZ diameter (4.8 ± 0.3 mm)compared to the mean programmed OZ (4.5 ± 0.5 mm, p = 0.00).Conclusions: Small ablation zones, when used in conjunction with a large diameter TZ, do not lead to agreater incidence of unwanted visual phenomena over that reported by many studies with larger OZs",
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Small optical zones with aspheric profiles in laser refractive surgery for myopia: A surgical outcome and patient satisfaction study. / Woodcock, M; Shah, S; Mandal, M; Pieger, S; Grills, C; Moore, Tara.

In: Contact Lens and Anterior Eye., Vol. 36, No. 5, 10.2013, p. 259-264.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Small optical zones with aspheric profiles in laser refractive surgery for myopia: A surgical outcome and patient satisfaction study

AU - Woodcock, M

AU - Shah, S

AU - Mandal, M

AU - Pieger, S

AU - Grills, C

AU - Moore, Tara

PY - 2013/10

Y1 - 2013/10

N2 - Purpose: To assess the outcomes of small optical zone (OZ) ablations used in conjunction with largetransition zones (TZ) and a highly aspheric treatment profile.Methods: Interventional case series of 39 consecutive patients with myopia or myopic astigmatism.Patient data included pre and postoperative refraction and visual acuities, laser treatment settings andpre and postoperative corneal topography as well as questionnaire responses about the use of glassesand the quality of vision postoperatively.Results: The mean preoperative spherical equivalent was −4.50 ± 2.11 dioptres (D) and the mean OZ andTZ diameters were 4.5 ± 0.5 mm and 8.1 ± 0.4 mm, respectively. The mean patient age was 40.7 ± 10.4years. Manifest spherical refraction was within ±0.5 D in 87% of patients (±1.0 D in 99%) and cylindricalrefraction within 0.5 D in 79% (≤1.0 D in 95%). The need to wear distance glasses postoperativelywas associated with dissatisfaction with the quality of daytime vision (p = 0.05) and unhappiness withnight vision was associated with symptoms of halos (p = 0.03) and starbursts (p = 0.02). The proportionof patients reporting symptoms of dysphotopsias included: ghosting 0%; glare 2%; halos 10%; and starbursts15%. There was a significant difference in the measured mean effective OZ diameter (4.8 ± 0.3 mm)compared to the mean programmed OZ (4.5 ± 0.5 mm, p = 0.00).Conclusions: Small ablation zones, when used in conjunction with a large diameter TZ, do not lead to agreater incidence of unwanted visual phenomena over that reported by many studies with larger OZs

AB - Purpose: To assess the outcomes of small optical zone (OZ) ablations used in conjunction with largetransition zones (TZ) and a highly aspheric treatment profile.Methods: Interventional case series of 39 consecutive patients with myopia or myopic astigmatism.Patient data included pre and postoperative refraction and visual acuities, laser treatment settings andpre and postoperative corneal topography as well as questionnaire responses about the use of glassesand the quality of vision postoperatively.Results: The mean preoperative spherical equivalent was −4.50 ± 2.11 dioptres (D) and the mean OZ andTZ diameters were 4.5 ± 0.5 mm and 8.1 ± 0.4 mm, respectively. The mean patient age was 40.7 ± 10.4years. Manifest spherical refraction was within ±0.5 D in 87% of patients (±1.0 D in 99%) and cylindricalrefraction within 0.5 D in 79% (≤1.0 D in 95%). The need to wear distance glasses postoperativelywas associated with dissatisfaction with the quality of daytime vision (p = 0.05) and unhappiness withnight vision was associated with symptoms of halos (p = 0.03) and starbursts (p = 0.02). The proportionof patients reporting symptoms of dysphotopsias included: ghosting 0%; glare 2%; halos 10%; and starbursts15%. There was a significant difference in the measured mean effective OZ diameter (4.8 ± 0.3 mm)compared to the mean programmed OZ (4.5 ± 0.5 mm, p = 0.00).Conclusions: Small ablation zones, when used in conjunction with a large diameter TZ, do not lead to agreater incidence of unwanted visual phenomena over that reported by many studies with larger OZs

KW - Refractive SurgeryLASIKLASEKOptical aberrations

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DO - 10.1016/j.clae.2013.02.010

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SP - 259

EP - 264

JO - Contact Lens and Anterior Eye

T2 - Contact Lens and Anterior Eye

JF - Contact Lens and Anterior Eye

SN - 1367-0484

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