DYNAMIC CONTOUR TONOMETRY AND GOLDMAN APPLANATION TONOMETRY IN EYES WITH KERATOCONUS
The dynamic contour tonometer is a nonapplanation contact tonometer designed to be largely independent of the structural properties of the cornea. Theoretically, it may measure intraocular pressure most accurately in abnormally thinner corneas. This study compares intraocular pressure measurements b...
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| Veröffentlicht in: | Clinics (São Paulo, Brazil) Brazil), 2006-12, Vol.61 (6), p.511-514 |
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| description | The dynamic contour tonometer is a nonapplanation contact tonometer designed to be largely independent of the structural properties of the cornea. Theoretically, it may measure intraocular pressure most accurately in abnormally thinner corneas. This study compares intraocular pressure measurements by dynamic contour tonometry with Goldman applanation tonometry in eyes with normal corneas and eyes with advanced keratoconus.
A comparative case series. Subjects underwent intraocular pressure measurements by dynamic contour tonometry, Goldman applanation tonometry, ultrasonic pachymetry, and slit scanning topography. Exclusion criteria: any ocular pathology other than keratoconus, previous corneal or refractive surgery, stromal scarring due to acute hydrops, or any other corneal opacities.
Ten patients with keratoconus were included in Group A, and 12 normal patients composed Group B according to the pre-established criteria. The mean Goldman tonometry measurement in group A was 10.3 ± 1.8 mm Hg and group B was 14.3 ± 0.75 mm Hg. (P = 0.024). In group A, the mean measurement with the dynamic contour tonometer was 14.6 ± 2.09 mm Hg, and in group B, it was 17.4 ± 3.1 mm Hg (P = 0.026). The difference between both methods of measurement in group A was statistically significant (P < 0.0002).
Intraocular pressure readings with dynamic contour tonometry in the keratoconus group were significantly higher than Goldman measurements and lower when compared to the control group. As there are no published manometric studies in eyes with keratoconus, these lower intra-ocular readings with the dynamic contour tonometry could be related to the discrepancy between the radius of corneal curvature and its tip, the significant thinning of the cornea, or other corneal biomechanical abnormalities related to advanced keratoconus.
O tonômetro de contorno dinâmico é um aparelho de contato e não-aplanação projetado para ser independente das propriedades estruturais da córnea. Teoricamente, ele mede de forma mais precisa a pressão intra-ocular em córneas muito finas. Este estudo compara as medidas de pressão intra-ocular pelo tonômetro de contorno dinâmico com a tonometria de aplanação de Goldman em olhos normais e em olhos com ceratocone avançado.
uma série comparativa de casos. Pacientes foram submetidos às medidas de pressão intra-ocular por ambos os métodos mencionados, paquimetria ultrassônica e topografia corneana de varredura. Critérios de exclusão: qualquer patologia ocular exc |
| doi_str_mv | 10.1590/S1807-59322006000600004 |
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A comparative case series. Subjects underwent intraocular pressure measurements by dynamic contour tonometry, Goldman applanation tonometry, ultrasonic pachymetry, and slit scanning topography. Exclusion criteria: any ocular pathology other than keratoconus, previous corneal or refractive surgery, stromal scarring due to acute hydrops, or any other corneal opacities.
Ten patients with keratoconus were included in Group A, and 12 normal patients composed Group B according to the pre-established criteria. The mean Goldman tonometry measurement in group A was 10.3 ± 1.8 mm Hg and group B was 14.3 ± 0.75 mm Hg. (P = 0.024). In group A, the mean measurement with the dynamic contour tonometer was 14.6 ± 2.09 mm Hg, and in group B, it was 17.4 ± 3.1 mm Hg (P = 0.026). The difference between both methods of measurement in group A was statistically significant (P < 0.0002).
Intraocular pressure readings with dynamic contour tonometry in the keratoconus group were significantly higher than Goldman measurements and lower when compared to the control group. As there are no published manometric studies in eyes with keratoconus, these lower intra-ocular readings with the dynamic contour tonometry could be related to the discrepancy between the radius of corneal curvature and its tip, the significant thinning of the cornea, or other corneal biomechanical abnormalities related to advanced keratoconus.
O tonômetro de contorno dinâmico é um aparelho de contato e não-aplanação projetado para ser independente das propriedades estruturais da córnea. Teoricamente, ele mede de forma mais precisa a pressão intra-ocular em córneas muito finas. Este estudo compara as medidas de pressão intra-ocular pelo tonômetro de contorno dinâmico com a tonometria de aplanação de Goldman em olhos normais e em olhos com ceratocone avançado.
uma série comparativa de casos. Pacientes foram submetidos às medidas de pressão intra-ocular por ambos os métodos mencionados, paquimetria ultrassônica e topografia corneana de varredura. Critérios de exclusão: qualquer patologia ocular exceto ceratocone, cirurgia ceratorrefrativa prévia, opacidade estromal resultante de hidropsia aguda ou qualquer outra opacidade corneana.
Dez pacientes com ceratocone foram incluídos no grupo A e 12 pacientes com córneas normais no grupo B conforme os critérios pré-estabelecidos. A média das medidas da tonometria de Goldman no grupo A foi de 10.3±1.8 mmHg e no grupo B de 14.3±0.75 mmHg. (p = 0,024). No grupo A, a média das medidas com o tonômetro de contorno dinâmico foi de 14.6±2,09 mmHg e, no grupo B,17,4±3,1 mmHg (p = 0,026). A diferença entre as medidas dos tonômetros no grupo A foi estatisticamente significante (p < 0.0002).
As medidas da pressão intra-ocular com o tonômetro de contorno dinâmico nos pacientes com ceratocone foram significativamente maiores que as medidas do Goldman e menores quando comparadas com o grupo controle. Na ausência de estudos manométricos em olhos com ceratocone, estas baixas medidas com a tonometria de contorno dinâmico podem estar relacionadas com a discrepância entre o raio de curvatura da córnea e a ponta do tonômetro, os baixos valores paquimétricos, ou outras anormalidades da biomecânica corneana relacionadas com o ceratocone avançado.</description><identifier>ISSN: 1807-5932</identifier><identifier>ISSN: 1980-5322</identifier><identifier>EISSN: 1980-5322</identifier><identifier>DOI: 10.1590/S1807-59322006000600004</identifier><identifier>PMID: 17187085</identifier><language>eng</language><publisher>Brazil: Elsevier España, S.L.U</publisher><subject>Adult ; Applanation Tonometry ; Biomechanical Phenomena ; Case-Control Studies ; Ceratocone ; Corneal Thickness ; Corneal Topography ; Dynamic Contour Tonometry ; Female ; Goldman ; Humans ; Intraocular Pressure ; Intraocular Pressure - physiology ; Keratoconous ; Keratoconus - diagnosis ; Keratoconus - physiopathology ; Male ; MEDICINE, GENERAL & INTERNAL ; Paquimetria ; Pressão intra-ocular ; Prospective Studies ; Reproducibility of Results ; Tonometria de aplanação ; Tonometria de contorno dinâmico ; Tonometry, Ocular - methods ; Tonometry, Ocular - standards</subject><ispartof>Clinics (São Paulo, Brazil), 2006-12, Vol.61 (6), p.511-514</ispartof><rights>2006 CLINICS</rights><rights>This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3724-33016aad58f45d0c0eb8ff06cccfb45ad979d73a18a0e1aa806534f5c2dbe4f93</citedby><cites>FETCH-LOGICAL-c3724-33016aad58f45d0c0eb8ff06cccfb45ad979d73a18a0e1aa806534f5c2dbe4f93</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,315,781,785,865,886,27928,27929</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/17187085$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Barreto, Jackson</creatorcontrib><creatorcontrib>Babic, Mirko</creatorcontrib><creatorcontrib>Vessani, Roberto Murad</creatorcontrib><creatorcontrib>Susanna, Remo</creatorcontrib><title>DYNAMIC CONTOUR TONOMETRY AND GOLDMAN APPLANATION TONOMETRY IN EYES WITH KERATOCONUS</title><title>Clinics (São Paulo, Brazil)</title><addtitle>Clinics (Sao Paulo)</addtitle><description>The dynamic contour tonometer is a nonapplanation contact tonometer designed to be largely independent of the structural properties of the cornea. Theoretically, it may measure intraocular pressure most accurately in abnormally thinner corneas. This study compares intraocular pressure measurements by dynamic contour tonometry with Goldman applanation tonometry in eyes with normal corneas and eyes with advanced keratoconus.
A comparative case series. Subjects underwent intraocular pressure measurements by dynamic contour tonometry, Goldman applanation tonometry, ultrasonic pachymetry, and slit scanning topography. Exclusion criteria: any ocular pathology other than keratoconus, previous corneal or refractive surgery, stromal scarring due to acute hydrops, or any other corneal opacities.
Ten patients with keratoconus were included in Group A, and 12 normal patients composed Group B according to the pre-established criteria. The mean Goldman tonometry measurement in group A was 10.3 ± 1.8 mm Hg and group B was 14.3 ± 0.75 mm Hg. (P = 0.024). In group A, the mean measurement with the dynamic contour tonometer was 14.6 ± 2.09 mm Hg, and in group B, it was 17.4 ± 3.1 mm Hg (P = 0.026). The difference between both methods of measurement in group A was statistically significant (P < 0.0002).
Intraocular pressure readings with dynamic contour tonometry in the keratoconus group were significantly higher than Goldman measurements and lower when compared to the control group. As there are no published manometric studies in eyes with keratoconus, these lower intra-ocular readings with the dynamic contour tonometry could be related to the discrepancy between the radius of corneal curvature and its tip, the significant thinning of the cornea, or other corneal biomechanical abnormalities related to advanced keratoconus.
O tonômetro de contorno dinâmico é um aparelho de contato e não-aplanação projetado para ser independente das propriedades estruturais da córnea. Teoricamente, ele mede de forma mais precisa a pressão intra-ocular em córneas muito finas. Este estudo compara as medidas de pressão intra-ocular pelo tonômetro de contorno dinâmico com a tonometria de aplanação de Goldman em olhos normais e em olhos com ceratocone avançado.
uma série comparativa de casos. Pacientes foram submetidos às medidas de pressão intra-ocular por ambos os métodos mencionados, paquimetria ultrassônica e topografia corneana de varredura. Critérios de exclusão: qualquer patologia ocular exceto ceratocone, cirurgia ceratorrefrativa prévia, opacidade estromal resultante de hidropsia aguda ou qualquer outra opacidade corneana.
Dez pacientes com ceratocone foram incluídos no grupo A e 12 pacientes com córneas normais no grupo B conforme os critérios pré-estabelecidos. A média das medidas da tonometria de Goldman no grupo A foi de 10.3±1.8 mmHg e no grupo B de 14.3±0.75 mmHg. (p = 0,024). No grupo A, a média das medidas com o tonômetro de contorno dinâmico foi de 14.6±2,09 mmHg e, no grupo B,17,4±3,1 mmHg (p = 0,026). A diferença entre as medidas dos tonômetros no grupo A foi estatisticamente significante (p < 0.0002).
As medidas da pressão intra-ocular com o tonômetro de contorno dinâmico nos pacientes com ceratocone foram significativamente maiores que as medidas do Goldman e menores quando comparadas com o grupo controle. Na ausência de estudos manométricos em olhos com ceratocone, estas baixas medidas com a tonometria de contorno dinâmico podem estar relacionadas com a discrepância entre o raio de curvatura da córnea e a ponta do tonômetro, os baixos valores paquimétricos, ou outras anormalidades da biomecânica corneana relacionadas com o ceratocone avançado.</description><subject>Adult</subject><subject>Applanation Tonometry</subject><subject>Biomechanical Phenomena</subject><subject>Case-Control Studies</subject><subject>Ceratocone</subject><subject>Corneal Thickness</subject><subject>Corneal Topography</subject><subject>Dynamic Contour Tonometry</subject><subject>Female</subject><subject>Goldman</subject><subject>Humans</subject><subject>Intraocular Pressure</subject><subject>Intraocular Pressure - physiology</subject><subject>Keratoconous</subject><subject>Keratoconus - diagnosis</subject><subject>Keratoconus - physiopathology</subject><subject>Male</subject><subject>MEDICINE, GENERAL & INTERNAL</subject><subject>Paquimetria</subject><subject>Pressão intra-ocular</subject><subject>Prospective Studies</subject><subject>Reproducibility of Results</subject><subject>Tonometria de aplanação</subject><subject>Tonometria de contorno dinâmico</subject><subject>Tonometry, Ocular - methods</subject><subject>Tonometry, Ocular - standards</subject><issn>1807-5932</issn><issn>1980-5322</issn><issn>1980-5322</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkVFLwzAUhYMoTqd_QfvkW-dN07TpY9jqVtzasXXInkKWptCxrbNZBf-9nZ0oCPoQEi7fOedygtA9hh6mATzOMQPfpgFxHAAP2gPuGbrCAQObNvPz5v0FddC1MWsAEhCXXqIO9jHzgdErlA6WMZ9EfaufxGmymFlpEieTMJ0tLR4PrGEyHkx4bPHpdMxjnkZJ_IOIYitchnPrJUpH1nM442nS2CzmN-gilxujb093Fy2ewrQ_ssfJMOrzsa2I77g2IYA9KTPKcpdmoECvWJ6Dp5TKVy6VWeAHmU8kZhI0lpKBR4mbU-VkK-3mAemiXutrVKE3pViXdbVrAsVnPeJXPY3goRXsq_K11uYgtoVRerORO13WRnjM8Qjzj6Dfgqoqjal0LvZVsZXVu8Agjj_wR8TdKaJebXX2rTtV3gC8BXTTzFuhK3Hcfqd0VlRaHURWFv-GfAAnjItB</recordid><startdate>200612</startdate><enddate>200612</enddate><creator>Barreto, Jackson</creator><creator>Babic, Mirko</creator><creator>Vessani, Roberto Murad</creator><creator>Susanna, Remo</creator><general>Elsevier España, S.L.U</general><general>Faculdade de Medicina / USP</general><scope>6I.</scope><scope>AAFTH</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><scope>GPN</scope></search><sort><creationdate>200612</creationdate><title>DYNAMIC CONTOUR TONOMETRY AND GOLDMAN APPLANATION TONOMETRY IN EYES WITH KERATOCONUS</title><author>Barreto, Jackson ; Babic, Mirko ; Vessani, Roberto Murad ; Susanna, Remo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3724-33016aad58f45d0c0eb8ff06cccfb45ad979d73a18a0e1aa806534f5c2dbe4f93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Adult</topic><topic>Applanation Tonometry</topic><topic>Biomechanical Phenomena</topic><topic>Case-Control Studies</topic><topic>Ceratocone</topic><topic>Corneal Thickness</topic><topic>Corneal Topography</topic><topic>Dynamic Contour Tonometry</topic><topic>Female</topic><topic>Goldman</topic><topic>Humans</topic><topic>Intraocular Pressure</topic><topic>Intraocular Pressure - physiology</topic><topic>Keratoconous</topic><topic>Keratoconus - diagnosis</topic><topic>Keratoconus - physiopathology</topic><topic>Male</topic><topic>MEDICINE, GENERAL & INTERNAL</topic><topic>Paquimetria</topic><topic>Pressão intra-ocular</topic><topic>Prospective Studies</topic><topic>Reproducibility of Results</topic><topic>Tonometria de aplanação</topic><topic>Tonometria de contorno dinâmico</topic><topic>Tonometry, Ocular - methods</topic><topic>Tonometry, Ocular - standards</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Barreto, Jackson</creatorcontrib><creatorcontrib>Babic, Mirko</creatorcontrib><creatorcontrib>Vessani, Roberto Murad</creatorcontrib><creatorcontrib>Susanna, Remo</creatorcontrib><collection>ScienceDirect Open Access Titles</collection><collection>Elsevier:ScienceDirect:Open Access</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><collection>SciELO</collection><jtitle>Clinics (São Paulo, Brazil)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Barreto, Jackson</au><au>Babic, Mirko</au><au>Vessani, Roberto Murad</au><au>Susanna, Remo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>DYNAMIC CONTOUR TONOMETRY AND GOLDMAN APPLANATION TONOMETRY IN EYES WITH KERATOCONUS</atitle><jtitle>Clinics (São Paulo, Brazil)</jtitle><addtitle>Clinics (Sao Paulo)</addtitle><date>2006-12</date><risdate>2006</risdate><volume>61</volume><issue>6</issue><spage>511</spage><epage>514</epage><pages>511-514</pages><issn>1807-5932</issn><issn>1980-5322</issn><eissn>1980-5322</eissn><abstract>The dynamic contour tonometer is a nonapplanation contact tonometer designed to be largely independent of the structural properties of the cornea. Theoretically, it may measure intraocular pressure most accurately in abnormally thinner corneas. This study compares intraocular pressure measurements by dynamic contour tonometry with Goldman applanation tonometry in eyes with normal corneas and eyes with advanced keratoconus.
A comparative case series. Subjects underwent intraocular pressure measurements by dynamic contour tonometry, Goldman applanation tonometry, ultrasonic pachymetry, and slit scanning topography. Exclusion criteria: any ocular pathology other than keratoconus, previous corneal or refractive surgery, stromal scarring due to acute hydrops, or any other corneal opacities.
Ten patients with keratoconus were included in Group A, and 12 normal patients composed Group B according to the pre-established criteria. The mean Goldman tonometry measurement in group A was 10.3 ± 1.8 mm Hg and group B was 14.3 ± 0.75 mm Hg. (P = 0.024). In group A, the mean measurement with the dynamic contour tonometer was 14.6 ± 2.09 mm Hg, and in group B, it was 17.4 ± 3.1 mm Hg (P = 0.026). The difference between both methods of measurement in group A was statistically significant (P < 0.0002).
Intraocular pressure readings with dynamic contour tonometry in the keratoconus group were significantly higher than Goldman measurements and lower when compared to the control group. As there are no published manometric studies in eyes with keratoconus, these lower intra-ocular readings with the dynamic contour tonometry could be related to the discrepancy between the radius of corneal curvature and its tip, the significant thinning of the cornea, or other corneal biomechanical abnormalities related to advanced keratoconus.
O tonômetro de contorno dinâmico é um aparelho de contato e não-aplanação projetado para ser independente das propriedades estruturais da córnea. Teoricamente, ele mede de forma mais precisa a pressão intra-ocular em córneas muito finas. Este estudo compara as medidas de pressão intra-ocular pelo tonômetro de contorno dinâmico com a tonometria de aplanação de Goldman em olhos normais e em olhos com ceratocone avançado.
uma série comparativa de casos. Pacientes foram submetidos às medidas de pressão intra-ocular por ambos os métodos mencionados, paquimetria ultrassônica e topografia corneana de varredura. Critérios de exclusão: qualquer patologia ocular exceto ceratocone, cirurgia ceratorrefrativa prévia, opacidade estromal resultante de hidropsia aguda ou qualquer outra opacidade corneana.
Dez pacientes com ceratocone foram incluídos no grupo A e 12 pacientes com córneas normais no grupo B conforme os critérios pré-estabelecidos. A média das medidas da tonometria de Goldman no grupo A foi de 10.3±1.8 mmHg e no grupo B de 14.3±0.75 mmHg. (p = 0,024). No grupo A, a média das medidas com o tonômetro de contorno dinâmico foi de 14.6±2,09 mmHg e, no grupo B,17,4±3,1 mmHg (p = 0,026). A diferença entre as medidas dos tonômetros no grupo A foi estatisticamente significante (p < 0.0002).
As medidas da pressão intra-ocular com o tonômetro de contorno dinâmico nos pacientes com ceratocone foram significativamente maiores que as medidas do Goldman e menores quando comparadas com o grupo controle. Na ausência de estudos manométricos em olhos com ceratocone, estas baixas medidas com a tonometria de contorno dinâmico podem estar relacionadas com a discrepância entre o raio de curvatura da córnea e a ponta do tonômetro, os baixos valores paquimétricos, ou outras anormalidades da biomecânica corneana relacionadas com o ceratocone avançado.</abstract><cop>Brazil</cop><pub>Elsevier España, S.L.U</pub><pmid>17187085</pmid><doi>10.1590/S1807-59322006000600004</doi><tpages>4</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Clinics (São Paulo, Brazil), 2006-12, Vol.61 (6), p.511-514 |
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| source | MEDLINE; Directory of Open Access Journals; Alma/SFX Local Collection; EZB Electronic Journals Library |
| subjects | Adult Applanation Tonometry Biomechanical Phenomena Case-Control Studies Ceratocone Corneal Thickness Corneal Topography Dynamic Contour Tonometry Female Goldman Humans Intraocular Pressure Intraocular Pressure - physiology Keratoconous Keratoconus - diagnosis Keratoconus - physiopathology Male MEDICINE, GENERAL & INTERNAL Paquimetria Pressão intra-ocular Prospective Studies Reproducibility of Results Tonometria de aplanação Tonometria de contorno dinâmico Tonometry, Ocular - methods Tonometry, Ocular - standards |
| title | DYNAMIC CONTOUR TONOMETRY AND GOLDMAN APPLANATION TONOMETRY IN EYES WITH KERATOCONUS |
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