Publicação
Age-related variations in corneal asphericity and long-term changes
| Resumo: | Purpose: Corneal front-surface asphericity is directly related with the optical quality of the eye and with contact lenses fitting. The purpose of this study was to evaluate the corneal asphericity as a function of age, sex, and refractive error measured with autokeratometry and corneal topography and its long-term changes (5- to 10-year period). Methods: The asphericity and corneal curvature were obtained with the autorefractometer/autokeratometer NIDEK ARK-700A and with the videokeratoscope MODI 2.0 and compared. Corneal asphericity was retrospectively analyzed with NIDEK ARK-700A. The longitudinal study of asphericity was conducted with the same device between 2 appointments within an interval of 5 to 10 years. Results: NIDEK ARK-700A showed agreement of asphericity values with those of MODI 2.0 (P¼0.172) for a 7-mm diameter chord. The mean Q value of 1,484 right eyes (58.6% female), with a mean age of 40.2618.4 years, was 20.2460.12. No differences were found for Q value between sexes (P¼0.424), age groups (P¼0.268), and refractive error groups (P¼0.107). The longitudinal analysis of corneal asphericity in 190 eyes (62.1% female) over a mean period of 5.961.4 years showed no significant differences in the Q value (0.0060.08, P¼0.813) over time. However, 14% showed asphericity changes of 60.10 or higher while 86% of the subjects showed a change below 60.10. Conclusions: The mean Q value observed in this study agrees with the average values of a white population and contributes to slightly reduce the positive spherical aberration of the eye. For the large majority of this population, the asphericity did not show significant changes within a period of 5 to 10 years, but significant changes can be observed in some patients. |
|---|---|
| Autores principais: | Amorim-de-Sousa, Ana |
| Outros Autores: | Vieira, Ana Cláudia; González-Méijome, José Manuel; Queirós, A. |
| Assunto: | Corneal topography Corneal asphericity Corneal curvature Corneal changes |
| Ano: | 2019 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| _version_ | 1866269198895808512 |
|---|---|
| author | Amorim-de-Sousa, Ana |
| author2 | Vieira, Ana Cláudia González-Méijome, José Manuel Queirós, A. |
| author2_role | author author author |
| author_facet | Amorim-de-Sousa, Ana Vieira, Ana Cláudia González-Méijome, José Manuel Queirós, A. |
| author_role | author |
| contributor_name_str_mv | Universidade do Minho |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Amorim-de-Sousa, Ana\"},{\"Person.name\":\"Vieira, Ana Cláudia\"},{\"Person.name\":\"González-Méijome, José Manuel\"},{\"Person.name\":\"Queirós, A.\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Universidade do Minho |
| datacite.creators.creator.creatorName.fl_str_mv | Amorim-de-Sousa, Ana Vieira, Ana Cláudia González-Méijome, José Manuel Queirós, A. |
| datacite.date.Accepted.fl_str_mv | 2019-01-01T00:00:00Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| datacite.subjects.subject.fl_str_mv | Corneal topography Corneal asphericity Corneal curvature Corneal changes |
| datacite.titles.title.fl_str_mv | Age-related variations in corneal asphericity and long-term changes |
| dc.contributor.none.fl_str_mv | Universidade do Minho |
| dc.creator.none.fl_str_mv | Amorim-de-Sousa, Ana Vieira, Ana Cláudia González-Méijome, José Manuel Queirós, A. |
| dc.date.Accepted.fl_str_mv | 2019-01-01T00:00:00Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | https://hdl.handle.net/1822/57069 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | Lippincott, Williams & Wilkins |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| dc.subject.none.fl_str_mv | Corneal topography Corneal asphericity Corneal curvature Corneal changes |
| dc.title.fl_str_mv | Age-related variations in corneal asphericity and long-term changes |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | Purpose: Corneal front-surface asphericity is directly related with the optical quality of the eye and with contact lenses fitting. The purpose of this study was to evaluate the corneal asphericity as a function of age, sex, and refractive error measured with autokeratometry and corneal topography and its long-term changes (5- to 10-year period). Methods: The asphericity and corneal curvature were obtained with the autorefractometer/autokeratometer NIDEK ARK-700A and with the videokeratoscope MODI 2.0 and compared. Corneal asphericity was retrospectively analyzed with NIDEK ARK-700A. The longitudinal study of asphericity was conducted with the same device between 2 appointments within an interval of 5 to 10 years. Results: NIDEK ARK-700A showed agreement of asphericity values with those of MODI 2.0 (P¼0.172) for a 7-mm diameter chord. The mean Q value of 1,484 right eyes (58.6% female), with a mean age of 40.2618.4 years, was 20.2460.12. No differences were found for Q value between sexes (P¼0.424), age groups (P¼0.268), and refractive error groups (P¼0.107). The longitudinal analysis of corneal asphericity in 190 eyes (62.1% female) over a mean period of 5.961.4 years showed no significant differences in the Q value (0.0060.08, P¼0.813) over time. However, 14% showed asphericity changes of 60.10 or higher while 86% of the subjects showed a change below 60.10. Conclusions: The mean Q value observed in this study agrees with the average values of a white population and contributes to slightly reduce the positive spherical aberration of the eye. For the large majority of this population, the asphericity did not show significant changes within a period of 5 to 10 years, but significant changes can be observed in some patients. |
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| eu_rights_str_mv | restrictedAccess |
| format | article |
| fulltext.url.fl_str_mv | https://prod-dspace.uminho.pt/bitstreams/68f34005-713b-4424-b47e-3fea35486fff/download |
| id | rum_c6ecfa953e61daf8560cb42e1be13b45 |
| identifier.url.fl_str_mv | https://hdl.handle.net/1822/57069 |
| instacron_str | repositorium |
| institution | Universidade do Minho |
| instname_str | Universidade do Minho |
| language | eng |
| network_acronym_str | rum |
| network_name_str | RepositóriUM - Universidade do Minho |
| oai_identifier_str | oai:repositorium.uminho.pt:1822/57069 |
| organization_str_mv | urn:organizationAcronym:repositorium |
| person_str_mv | Amorim-de-Sousa, Ana Vieira, Ana Cláudia González-Méijome, José Manuel Queirós, A. |
| publishDate | 2019 |
| publisher.none.fl_str_mv | Lippincott, Williams & Wilkins |
| reponame_str | RepositóriUM - Universidade do Minho |
| repository_id_str | urn:repositoryAcronym:rum |
| service_str_mv | urn:repositoryAcronym:rum |
| spelling | engLippincott, Williams & WilkinsporPurpose: Corneal front-surface asphericity is directly related with the optical quality of the eye and with contact lenses fitting. The purpose of this study was to evaluate the corneal asphericity as a function of age, sex, and refractive error measured with autokeratometry and corneal topography and its long-term changes (5- to 10-year period). Methods: The asphericity and corneal curvature were obtained with the autorefractometer/autokeratometer NIDEK ARK-700A and with the videokeratoscope MODI 2.0 and compared. Corneal asphericity was retrospectively analyzed with NIDEK ARK-700A. The longitudinal study of asphericity was conducted with the same device between 2 appointments within an interval of 5 to 10 years. Results: NIDEK ARK-700A showed agreement of asphericity values with those of MODI 2.0 (P¼0.172) for a 7-mm diameter chord. The mean Q value of 1,484 right eyes (58.6% female), with a mean age of 40.2618.4 years, was 20.2460.12. No differences were found for Q value between sexes (P¼0.424), age groups (P¼0.268), and refractive error groups (P¼0.107). The longitudinal analysis of corneal asphericity in 190 eyes (62.1% female) over a mean period of 5.961.4 years showed no significant differences in the Q value (0.0060.08, P¼0.813) over time. However, 14% showed asphericity changes of 60.10 or higher while 86% of the subjects showed a change below 60.10. Conclusions: The mean Q value observed in this study agrees with the average values of a white population and contributes to slightly reduce the positive spherical aberration of the eye. For the large majority of this population, the asphericity did not show significant changes within a period of 5 to 10 years, but significant changes can be observed in some patients.application/pdfporAge-related variations in corneal asphericity and long-term changesAmorim-de-Sousa, AnaVieira, Ana CláudiaGonzález-Méijome, José ManuelQueirós, A.HostingInstitutionOrganizationalUniversidade do Minhoe-mailmailto:repositorium@usdb.uminho.ptrepositorium@usdb.uminho.ptISSNIsPartOf1542-2321DOIIsPartOf10.1097/ICL.000000000000054020192018-11-23T19:07:20Z2019-01-01T00:00:00ZHandlehttps://hdl.handle.net/1822/57069http://purl.org/coar/access_right/c_16ecrestricted accessCorneal topographyCorneal asphericityCorneal curvatureCorneal changes309384 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal articlehttp://purl.org/coar/access_right/c_16ecapplication/pdffulltexthttps://prod-dspace.uminho.pt/bitstreams/68f34005-713b-4424-b47e-3fea35486fff/download |
| spellingShingle | Age-related variations in corneal asphericity and long-term changes Amorim-de-Sousa, Ana Corneal topography Corneal asphericity Corneal curvature Corneal changes |
| status | SINGLETON |
| subject.fl_str_mv | Corneal topography Corneal asphericity Corneal curvature Corneal changes |
| title | Age-related variations in corneal asphericity and long-term changes |
| title_full | Age-related variations in corneal asphericity and long-term changes |
| title_fullStr | Age-related variations in corneal asphericity and long-term changes |
| title_full_unstemmed | Age-related variations in corneal asphericity and long-term changes |
| title_short | Age-related variations in corneal asphericity and long-term changes |
| title_sort | Age-related variations in corneal asphericity and long-term changes |
| topic | Corneal topography Corneal asphericity Corneal curvature Corneal changes |
| topic_facet | Corneal topography Corneal asphericity Corneal curvature Corneal changes |
| url | https://hdl.handle.net/1822/57069 |
| visible | 1 |