Computerised calculation scheme for ocular magnification with the Zeiss telecentric fundus camera

Ophthalmic and Physiological Optics

Volumn 23, Issue 5, 2003, Pages 449-455

  Langenbucher, Achim ^a   Seitz, Berthold ^a   Viestenz, Arne ^a  

^a UNIVERSITY OF ERLANGEN NUREMBERG   (Germany)

Author keywords

Astigmatism; Calculation scheme; Factor Q; Model eye; Ocular magnification; Ray tracing

Indexed keywords

ANTERIOR EYE CHAMBER DEPTH; ARTICLE; CAMERA; CORNEA; EYE AXIS LENGTH; EYE REFRACTION; HUMAN; IN VIVO STUDY; KERATOMETRY; LENS; MATHEMATICAL COMPUTING; OPTOMETRY; PRIORITY JOURNAL; REFRACTION ERROR; RETINA IMAGE; ANTERIOR EYE CHAMBER; BIOLOGICAL MODEL; COMPUTER; EYE; EYE FUNDUS; HISTOLOGY; INSTRUMENTATION; MATHEMATICS; METHODOLOGY; OPHTHALMOSCOPY; OPTIC DISK; PATHOLOGY; PHOTOGRAPHY;

ANTERIOR CHAMBER; COMPUTERS; CORNEA; EYE; FUNDUS OCULI; HUMANS; LENS, CRYSTALLINE; MATHEMATICS; MODELS, BIOLOGICAL; OPHTHALMOSCOPY; OPTIC DISK; PHOTOGRAPHY; REFRACTION, OCULAR; REFRACTIVE ERRORS;

EID: 0242304909     PISSN: 02755408     EISSN: None     Source Type: Journal    
DOI: 10.1046/j.1475-1313.2003.00140.x     Document Type: Article

References (18)

1. Barr, D. B. (1995) An appraisal of the accuracy of Littmann's method of determining the real dimensions of a retinal object. Acta Ophthalmol. Scand. 216, 1-12.
2. Behrendt, T. and Doyle, K. E. (1965) Reliability of image size measurements in the new Zeiss fundus camera. Am. J. Ophthalmol. 59, 896-899.
3. Bengtsson, B. and Krakau, C. E. T. (1977) Some essential optical features of the Zeiss fundus camera. Acta Ophthalmol. 55, 123-131.
4. Bengtsson, B. and Krakau, C. E. T. (1992) Correction of optic disc measurements on fundus photographs. Graefes Arch Clin. Exp. Ophthalmol. 230, 24-28.
5. Bennett, A. G. (1986a) Two simple calculation schemes for use in ophthalmic optics. - I: Tracing oblique rays through Systems including astigmatic surfaces. Ophthalmic Physiol. Opt. 6, 325-331.
6. Bennett, A. G. (1986b) Two simple calculation schemes for use in ophthalmic optics. - II: Tracing axial pencils through systems including astigmatic surfaces at random axes. Ophthalmic Physiol. Opt. 6, 419-429.
7. Bennett, A. G. (1988) A method of determining the equivalent powers of the eye and its crystalline lens without resort to phakometry. Ophthalmic Physiol. Opt. 8, 53-59.
8. Bennett, A. G., Rudnicka, A. R. and Edgar, D. F. (1994) Improvement on Littmann's method of determining the size of retinal features by fundus photography. Graefes Arch Clin. Exp. Ophthalmol. 232, 361-367.
9. Ganvay-Heath, D. F., Rudnicka, A. R., Lowe, T., Foster, P. J., Fitzke, F. W. and Hitchings, R. A. (1998) Measurement of optic disc size: equivalence of methods to correct for ocular magnification. Br. J. Ophthalmol. 82, 643-649.
10. Gullstrand, A. (1909) Anhang zu Teil 1. In: Physiologische OptikBand 1, (ed. H. von Helmholtz), 3. Ausgabe, Voss, Hamburg, pp. 350-358.
11. Haigis, W. (1995) Biometrie. In: Augenärztliche Untersuchungsmethoden (eds Straub W, Kroll P, Küchle HJ), Biermann, Köln, Germany, pp. 255-304.
12. Langenbucher, A. and Seitz, B. (2003a) Calculation scheme for bitoric eikonic intraocular lenses. Ophthalmic Physiol. Opt. 23, 213-220.
13. Langenbucher, A., Sauer, T., van der Heyd, G. J., Viestenz, A. and Seitz, B. (2003b) Raytracing von Hornhauttopographiedaten zur Ermittlung der optischen Abbildungsqualität des Auges. Klin Monatsbl Augenheilkd 220, 235-246.
14. Littmann, H. (1982) Zur Bestimmung der wahren Größeeines Objektes auf dem Hintergrund eines lebenden Auges. Klin Monatsbl Augenheilkd 180, 286-289.
15. Littmann, H. (1988) Zur Bestimmung der wahren Größeeines Objektes auf dem Hintergrund eines lebenden Auges. Klin Monatsbl Augenheilkd 192, 66-67.
16. Lotmar, W. (1984) Dependence of magnification upon the camera-to-eye distance in the Zeiss fundus camera. Acta Ophthalmol. 62, 131-134.
17. Rudnicka, A. R., Edgar, D. F. and Bennett, A. G. (1992) Construction of a model eye and its applications. Ophthalmic Physiol. Opt. 12, 485-490.
18. Rudnicka, A. R., Burk, R. O., Edgar, D. F. and Fitzke, F. W. (1998) Magnification characteristics of fundus imaging systems. Ophthalmology 105, 2186-2192.