Über Variabilität und Korrelation bei den verschiedenen Abmessungen des Auges

Berg, Fredrik

doi:10.1007/bf01855911

Cited by 20 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Keratometers are not constructed to measure a refraction of less than 30 dioptres and only a few authors, Friede (1921), Berg (1931) and Forsius & von Fieandt (1963), have developed special equipment for this purpose. The best way is to place a weak plus lens in front of the keratometer, after which you can measure low corneal refractions.…”

Section: Discussionmentioning

confidence: 99%

“…We have found in the literature only 18 articles, (not including those from Finland, which will be discussed separately) describing a total of 19 single cases of the recessive type of cornea plana in which the patients were not apparently related to each other (Berg 1931;Broekema 1909;Dada et al 1988;Ferdinando 1941;Cockburn 1944;Fishman et al 1982;Focosi 1967;Friede 1921;Granströ m 1951;Henry 1962;Malik et al 1965;Nath et al 1964;Razemon et al 1971 (two cases); Rizzini & Scialdone 1966;Sharkey et al 1992;Shorb 1972, Swett 1924and Velicky & Vrabec 1951).…”

mentioning

confidence: 99%

“…In the solitary cases which Berg (1931) and Dada et al (1988) described, the parents were consanguineous. Many of the articles listed above mention that no other case of cornea plana had been found in the family.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Autosomal recessive cornea plana. A clinical and genetic study of 78 cases in Finland

Forsius

Damsten

Eriksson

et al. 1998

Acta Ophthalmologica Scandinavica

View full text Add to dashboard Cite

ABSTRACT.Purpose: To review the literature of autosomal recessive cornea plana (RCP) and to perform a clinical and genetic study on this disorder in Finland. The 78 Finnish RCP patients represent the majority of RCP cases worldwide; outside Finland only 35 cases have been reported. Methods: Families with RCP, particularly in northern Finland, have been followed up by the senior author since the 1950s and extensive genealogical studies have been made. Results: The most typical symptoms are greatly reduced corneal refraction, 25-35 dioptres, causing strong hyperopia, slight microcornea, an extended limbus zone, a central, deep corneal opacity and a marked arcus senilis, seen even before the age of 20. We present a pedigree comprising 33 affected persons with cornea plana. We have mapped the two genes for the dominantly and the recessively inherited type of cornea plana to the same region on the long arm of chromosome 12, (12q21). Conclusions: In northern Finland RCP has a higher frequency than elsewhere, probably as a result of a strong founder effect in the population that arrived in these regions approx. 400 years ago. The strong accumulation of this rare disease in these isolated areas and the strong genealogical connections between different families with RCP, suggest that probably all the Finnish RCP cases are caused by the same mutation.

show abstract

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Autosomal recessive cornea plana. A clinical and genetic study of 78 cases in Finland

Forsius

Damsten

Eriksson

et al. 1998

Acta Ophthalmologica Scandinavica

View full text Add to dashboard Cite

show abstract

“…

Early studies [1][2][3][4] established that ocular biometric parameters can vary widely between individuals and that strong correlations exist between these parameters, in both emmetropes and ametropes. However, as refractive errors are caused by a mismatch between these parameters, different correlations are found in each refractive group.

…”

mentioning

confidence: 99%

The influence of variations in ocular biometric and optical parameters on differences in refractive error

Farzanfar,

Lockett‐Ruiz,

Navarro

et al. 2024

Ophthalmic Physiologic Optic

View full text Add to dashboard Cite

PurposeTo present a paraxial method to estimate the influence of variations in ocular biometry on changes in refractive error (S) at a population level and apply this method to literature data.MethodsError propagation was applied to two methods of eye modelling, referred to as the simple method and the matrix method. The simple method defines S as the difference between the axial power and the whole‐eye power, while the matrix method uses more accurate ray transfer matrices. These methods were applied to literature data, containing the mean ocular biometry data from the SyntEyes model, as well as populations of premature infants with or without retinopathy, full‐term infants, school children and healthy and diabetic adults.ResultsApplying these equations to 1000 SyntEyes showed that changes in axial length provided the most important contribution to the variations in refractive error (57%–64%), followed by lens power/gradient index power (16%–31%) and the anterior corneal radius of curvature (10%–13%). All other components of the eye contributed <4%. For young children, the largest contributions were made by variations in axial length, lens and corneal power for the simple method (67%, 23% and 8%, respectively) and by variations in axial length, gradient lens power and anterior corneal curvature for the matrix method (55%, 21% and 14%, respectively). During myopisation, the influence of variations in axial length increased from 54.5% to 73.4%, while changes in corneal power decreased from 9.82% to 6.32%. Similarly, for the other data sets, the largest contribution was related to axial length.ConclusionsThis analysis confirms that the changes in ocular refraction were mostly associated with variations in axial length, lens and corneal power. The relative contributions of the latter two varied, depending on the particular population.

show abstract

Der Bulbus als Ganzes

Wessely

1937

Auge 3

View full text Add to dashboard Cite

Über Variabilität und Korrelation bei den verschiedenen Abmessungen des Auges

Cited by 20 publications

References 7 publications

Autosomal recessive cornea plana. A clinical and genetic study of 78 cases in Finland

Autosomal recessive cornea plana. A clinical and genetic study of 78 cases in Finland

The influence of variations in ocular biometric and optical parameters on differences in refractive error

Der Bulbus als Ganzes

Contact Info

Product

Resources

About