The effect of LASIK on best-corrected high-and low-contrast visual acuity
To evaluate the effects of laser in situ keratomileusis (LASIK) and LASIK with concurrent astigmatic keratectomy (LASIK/AK) on high- and low-contrast visual acuity. The setting was a university refractive surgery practice. Patients were recruited from those undergoing LASIK or LASIK/AK for myopia (&...
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| Veröffentlicht in: | Optometry and vision science 2004-05, Vol.81 (5), p.362-368 |
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| creator | BAILEY, Melissa D OLSON, Michael D BULLIMORE, Mark A JONES, Lisa MALONEY, Robert K |
| description | To evaluate the effects of laser in situ keratomileusis (LASIK) and LASIK with concurrent astigmatic keratectomy (LASIK/AK) on high- and low-contrast visual acuity.
The setting was a university refractive surgery practice. Patients were recruited from those undergoing LASIK or LASIK/AK for myopia (>1.00 D spherical equivalent) between May 1996 and August 1997. All subjects were at least 21 years of age. Testing occurred preoperatively and 3 and 6 months after LASIK. Main outcome measures were best spectacle-corrected, high- and low-contrast visual acuity.
For all subjects, there was a significant effect of surgery on nondilated low-contrast visual acuity (repeated measures two-way analysis of variance, p < 0.0001). Tukey's posthoc analysis showed that preoperative low-contrast visual acuity scores were significantly different from 3-month [0.08 logarithm of the minimum angle of resolution (logMAR)] and 6-month (0.11 logMAR) scores for patients undergoing LASIK and LASIK/AK. Under dilated conditions, there was a significant effect of surgery for high- and low-contrast visual acuity (analysis of variance, p < 0.0001 for both). Only changes in low-contrast visual acuity were clinically meaningful [LASIK, visual acuity reduction of 0.1 logMAR (1 line); LASIK/AK, visual acuity reduction of 0.15 logMAR (1.5 lines)]. When considering high and low myopes separately (LASIK only), the level of myopia had a significant effect on the visual acuity after surgery (analysis of variance, p = 0.01). Preoperative, dilated, low-contrast visual acuity scores for high myopes were significantly different from 3-month (0.14 logMAR) and 6-month (0.13 logMAR) scores. No differences were noted for low myopes.
Clinically meaningful postoperative changes in low-contrast visual acuity were noted in patients undergoing LASIK and LASIK/AK under natural and dilated conditions. Postoperative, dilated, low-contrast visual acuity scores were significantly worse than preoperative scores for high myopes, but remained unchanged for low myopes. |
| doi_str_mv | 10.1097/01.opx.0000134910.28898.ce |
| format | Article |
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The setting was a university refractive surgery practice. Patients were recruited from those undergoing LASIK or LASIK/AK for myopia (>1.00 D spherical equivalent) between May 1996 and August 1997. All subjects were at least 21 years of age. Testing occurred preoperatively and 3 and 6 months after LASIK. Main outcome measures were best spectacle-corrected, high- and low-contrast visual acuity.
For all subjects, there was a significant effect of surgery on nondilated low-contrast visual acuity (repeated measures two-way analysis of variance, p < 0.0001). Tukey's posthoc analysis showed that preoperative low-contrast visual acuity scores were significantly different from 3-month [0.08 logarithm of the minimum angle of resolution (logMAR)] and 6-month (0.11 logMAR) scores for patients undergoing LASIK and LASIK/AK. Under dilated conditions, there was a significant effect of surgery for high- and low-contrast visual acuity (analysis of variance, p < 0.0001 for both). Only changes in low-contrast visual acuity were clinically meaningful [LASIK, visual acuity reduction of 0.1 logMAR (1 line); LASIK/AK, visual acuity reduction of 0.15 logMAR (1.5 lines)]. When considering high and low myopes separately (LASIK only), the level of myopia had a significant effect on the visual acuity after surgery (analysis of variance, p = 0.01). Preoperative, dilated, low-contrast visual acuity scores for high myopes were significantly different from 3-month (0.14 logMAR) and 6-month (0.13 logMAR) scores. No differences were noted for low myopes.
Clinically meaningful postoperative changes in low-contrast visual acuity were noted in patients undergoing LASIK and LASIK/AK under natural and dilated conditions. Postoperative, dilated, low-contrast visual acuity scores were significantly worse than preoperative scores for high myopes, but remained unchanged for low myopes.</description><identifier>ISSN: 1040-5488</identifier><identifier>EISSN: 1538-9235</identifier><identifier>DOI: 10.1097/01.opx.0000134910.28898.ce</identifier><identifier>PMID: 15181361</identifier><identifier>CODEN: OVSCET</identifier><language>eng</language><publisher>Hagerstown, MD: Lippincott Williams & Wilkins</publisher><subject>Adult ; Astigmatism - physiopathology ; Astigmatism - surgery ; Biological and medical sciences ; Contrast Sensitivity - physiology ; Cornea - surgery ; Humans ; Keratomileusis, Laser In Situ ; Medical sciences ; Myopia - physiopathology ; Myopia - surgery ; Ocular Physiological Phenomena ; Prospective Studies ; Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases ; Surgery of the eye and orbit ; Visual Acuity - physiology</subject><ispartof>Optometry and vision science, 2004-05, Vol.81 (5), p.362-368</ispartof><rights>2004 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c345t-83b8ff5add4aaf60564c78860f00460c03b2dd3f1469f0f49e07c08b9002b8203</citedby><cites>FETCH-LOGICAL-c345t-83b8ff5add4aaf60564c78860f00460c03b2dd3f1469f0f49e07c08b9002b8203</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,781,785,27929,27930</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=15767762$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/15181361$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>BAILEY, Melissa D</creatorcontrib><creatorcontrib>OLSON, Michael D</creatorcontrib><creatorcontrib>BULLIMORE, Mark A</creatorcontrib><creatorcontrib>JONES, Lisa</creatorcontrib><creatorcontrib>MALONEY, Robert K</creatorcontrib><title>The effect of LASIK on best-corrected high-and low-contrast visual acuity</title><title>Optometry and vision science</title><addtitle>Optom Vis Sci</addtitle><description>To evaluate the effects of laser in situ keratomileusis (LASIK) and LASIK with concurrent astigmatic keratectomy (LASIK/AK) on high- and low-contrast visual acuity.
The setting was a university refractive surgery practice. Patients were recruited from those undergoing LASIK or LASIK/AK for myopia (>1.00 D spherical equivalent) between May 1996 and August 1997. All subjects were at least 21 years of age. Testing occurred preoperatively and 3 and 6 months after LASIK. Main outcome measures were best spectacle-corrected, high- and low-contrast visual acuity.
For all subjects, there was a significant effect of surgery on nondilated low-contrast visual acuity (repeated measures two-way analysis of variance, p < 0.0001). Tukey's posthoc analysis showed that preoperative low-contrast visual acuity scores were significantly different from 3-month [0.08 logarithm of the minimum angle of resolution (logMAR)] and 6-month (0.11 logMAR) scores for patients undergoing LASIK and LASIK/AK. Under dilated conditions, there was a significant effect of surgery for high- and low-contrast visual acuity (analysis of variance, p < 0.0001 for both). Only changes in low-contrast visual acuity were clinically meaningful [LASIK, visual acuity reduction of 0.1 logMAR (1 line); LASIK/AK, visual acuity reduction of 0.15 logMAR (1.5 lines)]. When considering high and low myopes separately (LASIK only), the level of myopia had a significant effect on the visual acuity after surgery (analysis of variance, p = 0.01). Preoperative, dilated, low-contrast visual acuity scores for high myopes were significantly different from 3-month (0.14 logMAR) and 6-month (0.13 logMAR) scores. No differences were noted for low myopes.
Clinically meaningful postoperative changes in low-contrast visual acuity were noted in patients undergoing LASIK and LASIK/AK under natural and dilated conditions. Postoperative, dilated, low-contrast visual acuity scores were significantly worse than preoperative scores for high myopes, but remained unchanged for low myopes.</description><subject>Adult</subject><subject>Astigmatism - physiopathology</subject><subject>Astigmatism - surgery</subject><subject>Biological and medical sciences</subject><subject>Contrast Sensitivity - physiology</subject><subject>Cornea - surgery</subject><subject>Humans</subject><subject>Keratomileusis, Laser In Situ</subject><subject>Medical sciences</subject><subject>Myopia - physiopathology</subject><subject>Myopia - surgery</subject><subject>Ocular Physiological Phenomena</subject><subject>Prospective Studies</subject><subject>Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases</subject><subject>Surgery of the eye and orbit</subject><subject>Visual Acuity - physiology</subject><issn>1040-5488</issn><issn>1538-9235</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpNkEtPwzAMgCMEYmPwF1CEBLcWp3k05TZNPCYmcWCcozRNWFHXjqQF9u8JMGnk4sj-7DgfQhcEUgJFfg0k7TZfKcRDKCtiOpOykKmxB2hMOJVJkVF-GO_AIOFMyhE6CeEt4jnl4hiNCCeSUEHGaL5cWWyds6bHncOL6fP8EXctLm3oE9N5Hwu2wqv6dZXotsJN9xnTbe916PFHHQbdYG2Gut-eoiOnm2DPdnGCXu5ul7OHZPF0P59NF4mhjPeJpKV0juuqYlo7AVwwk0spwAEwAQZomVUVdYSJwoFjhYXcgCwLgKyUGdAJuvqbu_Hd-xDXVOs6GNs0urXdEFSexX8ykUXw5g80vgvBW6c2vl5rv1UE1I9IBURFkWovUv2KVMbG5vPdK0O5ttW-dWcuApc7QAejG-d1a-rwj8tFnsctvgHzhHwd</recordid><startdate>20040501</startdate><enddate>20040501</enddate><creator>BAILEY, Melissa D</creator><creator>OLSON, Michael D</creator><creator>BULLIMORE, Mark A</creator><creator>JONES, Lisa</creator><creator>MALONEY, Robert K</creator><general>Lippincott Williams & Wilkins</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20040501</creationdate><title>The effect of LASIK on best-corrected high-and low-contrast visual acuity</title><author>BAILEY, Melissa D ; OLSON, Michael D ; BULLIMORE, Mark A ; JONES, Lisa ; MALONEY, Robert K</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c345t-83b8ff5add4aaf60564c78860f00460c03b2dd3f1469f0f49e07c08b9002b8203</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Adult</topic><topic>Astigmatism - physiopathology</topic><topic>Astigmatism - surgery</topic><topic>Biological and medical sciences</topic><topic>Contrast Sensitivity - physiology</topic><topic>Cornea - surgery</topic><topic>Humans</topic><topic>Keratomileusis, Laser In Situ</topic><topic>Medical sciences</topic><topic>Myopia - physiopathology</topic><topic>Myopia - surgery</topic><topic>Ocular Physiological Phenomena</topic><topic>Prospective Studies</topic><topic>Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases</topic><topic>Surgery of the eye and orbit</topic><topic>Visual Acuity - physiology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>BAILEY, Melissa D</creatorcontrib><creatorcontrib>OLSON, Michael D</creatorcontrib><creatorcontrib>BULLIMORE, Mark A</creatorcontrib><creatorcontrib>JONES, Lisa</creatorcontrib><creatorcontrib>MALONEY, Robert K</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Optometry and vision science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>BAILEY, Melissa D</au><au>OLSON, Michael D</au><au>BULLIMORE, Mark A</au><au>JONES, Lisa</au><au>MALONEY, Robert K</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The effect of LASIK on best-corrected high-and low-contrast visual acuity</atitle><jtitle>Optometry and vision science</jtitle><addtitle>Optom Vis Sci</addtitle><date>2004-05-01</date><risdate>2004</risdate><volume>81</volume><issue>5</issue><spage>362</spage><epage>368</epage><pages>362-368</pages><issn>1040-5488</issn><eissn>1538-9235</eissn><coden>OVSCET</coden><abstract>To evaluate the effects of laser in situ keratomileusis (LASIK) and LASIK with concurrent astigmatic keratectomy (LASIK/AK) on high- and low-contrast visual acuity.
The setting was a university refractive surgery practice. Patients were recruited from those undergoing LASIK or LASIK/AK for myopia (>1.00 D spherical equivalent) between May 1996 and August 1997. All subjects were at least 21 years of age. Testing occurred preoperatively and 3 and 6 months after LASIK. Main outcome measures were best spectacle-corrected, high- and low-contrast visual acuity.
For all subjects, there was a significant effect of surgery on nondilated low-contrast visual acuity (repeated measures two-way analysis of variance, p < 0.0001). Tukey's posthoc analysis showed that preoperative low-contrast visual acuity scores were significantly different from 3-month [0.08 logarithm of the minimum angle of resolution (logMAR)] and 6-month (0.11 logMAR) scores for patients undergoing LASIK and LASIK/AK. Under dilated conditions, there was a significant effect of surgery for high- and low-contrast visual acuity (analysis of variance, p < 0.0001 for both). Only changes in low-contrast visual acuity were clinically meaningful [LASIK, visual acuity reduction of 0.1 logMAR (1 line); LASIK/AK, visual acuity reduction of 0.15 logMAR (1.5 lines)]. When considering high and low myopes separately (LASIK only), the level of myopia had a significant effect on the visual acuity after surgery (analysis of variance, p = 0.01). Preoperative, dilated, low-contrast visual acuity scores for high myopes were significantly different from 3-month (0.14 logMAR) and 6-month (0.13 logMAR) scores. No differences were noted for low myopes.
Clinically meaningful postoperative changes in low-contrast visual acuity were noted in patients undergoing LASIK and LASIK/AK under natural and dilated conditions. Postoperative, dilated, low-contrast visual acuity scores were significantly worse than preoperative scores for high myopes, but remained unchanged for low myopes.</abstract><cop>Hagerstown, MD</cop><pub>Lippincott Williams & Wilkins</pub><pmid>15181361</pmid><doi>10.1097/01.opx.0000134910.28898.ce</doi><tpages>7</tpages></addata></record> |
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| ispartof | Optometry and vision science, 2004-05, Vol.81 (5), p.362-368 |
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| source | Ovid Lippincott Williams and Wilkins Journal Legacy Archive; MEDLINE; EZB Electronic Journals Library; Journals@Ovid Complete |
| subjects | Adult Astigmatism - physiopathology Astigmatism - surgery Biological and medical sciences Contrast Sensitivity - physiology Cornea - surgery Humans Keratomileusis, Laser In Situ Medical sciences Myopia - physiopathology Myopia - surgery Ocular Physiological Phenomena Prospective Studies Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases Surgery of the eye and orbit Visual Acuity - physiology |
| title | The effect of LASIK on best-corrected high-and low-contrast visual acuity |
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