Czech and Slovak Ophthalmology 302 10.31348/2023/36 Original article The Far Nasal Part of the Visual Field – Part I Lešták Ján https://orcid.org/0000-0001-9630-3441 Fůs Martin https://orcid.org/0000-0003-3245-4544 Lešták Tomáš Pitrová Šárka https://orcid.org/0000-0001-8472-9234 25 11 2023 6 3

Aims: The aim of the study was to determine the limits of the far nasal part of the visual field. Material and Methods: Visual field examination was performed in 15 healthy subjects (30 eyes), specifically nine women aged 20–43 years and six men aged 22–35 years. All eyes were found to have physiological ocular findings and visual acuity of 1.0 with correction less than or equal to 3 diopters. The visual field was examined with a Medmont M700 instrument by shifting the fixation point 40 degrees temporally and simultaneously turning the head nasally, with a spatial accommodation program. A total of 89 examination points were included using flicker stimuli. Results: The far nasal limit of the visual field reached 100° in 13.3% of eyes, 105° in 20% of eyes and up to 110° in 66.7% of eyes. Conclusion: The limit of the far nasal part of the field of vision reached 100–110 degrees (when nose shielding was eliminated).

 visual field nasal range of visual field perimetry enhanced perimetry References Purkyně JE. Beobachtungen u. Versuche zur Physiologie der Sinne. II. Neue Beiträge zur Kenntniss des Sehens in subjektiver Hinsicht; Reimer, Berlin 1825. Kurz J. Neuro-oftalmologická diagnostika. SZN Praha 1956, s. 1018. Heissigerová J a kol. Oftalmologie. Maxdorf Jessenius. 2018. ISBN 978-80-7345-580-4. Pöppel E, Harvey LO Jr. Light-difference threshold and subjective brightness in the periphery of the visual field. Psychol Forsch. 1973:145-161. Spector RH. In. Walker K, Hall WD and Hurst JW. Clinical Methods: The History, Physical, and Laboratory Examinations. 3rd edition. Boston: Butterworths; 1990. ISBN-10: 0-409-90077-X. Heijl A, Patella VM, Bengtssone B. Effective perimetry: The field analyser primer Fourth edition. Carl Zeiss Meditec, Inc. 2012. ISBN 0-9884795-0-8 Heijl A, Patella VM. Essential perimetry. The field analyser primer. Third edition. Carl Zeiss Meditec, Inc. 2002. ISBN 0-9721560-0-3. Racette L, Fischer M, Bebie H, Holló G, Johnson CA, Matsumoto C. A guide to perimetry and the Octopus perimeter. Haag-Streit AG Könitz, Switzerland, 2018, 7th edition, ISBN: 978-3-033- 06551-2. Lestak J, Lestak T, Fus M, Klimesova I. Temporal Visual Field Border. Clin Ophthalmol. 2021 Aug 3;15:3241-3246. doi: 10.2147/OPTH. S32111010.2147/OPTH Østerberg G. Topography of the layer of rods and cones in the human retina. Acta ophthalmol. Suppl. 1935;13:1-102. Curcio CA, Sloan KR, Kalina RE, Hendrickson AE. Human photoreceptor topogtraphy. J Comp Neurol. 1990;292:497-523. doi: 10.1002/cne.90292040210.1002/cne.902920402 Mustafi D, Engel AH, Palczewski K. Structure of cone photoreceptors. Prog Retin Eye Res. 2009 Jul; 28(4):289-302. Curcio CA, Allen KA. Topography of ganglion cells in human retina. J Comp Neurol. 1990;300:5-25. doi: 10.1002/cne.903000103.PMID: 222948710.1002/cne.903000103.PMID Skalicky SE. Ocular and visual physiology. Clinical application. Springer Science+Business Media Singapore Pte Ltd., Australia 2016, Chapter 8, p. 123. Bosworth CF, Sample PA, Weinreb RN. Motion perception thresholds in areas of glaucomatous visual field loss. Vision Res. 1997;37:355-364. Johnson CA, Samuels SJ. Screening for glaucomatous visual field loss with frequency-doubling perimetry. Invest Ophthalmol Vis Sci. 1997;38:413-425. Arend KO, Plange N. Diagnostic approaches for early detection of glaucoma progression. Klin Monbl Augenheilkd. 2006;223:194-216. Ferreras A, Polo V, Larrosa JM. et al. Can frequency-doubling technology and short-wavelength automated perimetries detect visual field defects before standard automated perimetry in patients with preperimetric glaucoma? J Glaucoma. 2007;16:372-383. Nomoto H, Matsumoto C, Takada S. et al. Detectability of glaucomatous changes using SAP, FDT, flicker perimetry, and OCT. J Glaucoma. 2009;18:165-171. Horn FK, Jonas JB, Korth M, Junemann A, Grundler A.The fullfield flicker test in early diagnosis of chronic open-angle glaucoma. Am J Ophthalmol. 1997;123:313-319. Horn FK, Tornow RP, Junemann AG, Laemmer R, Kremers J. Perimetric measurements with flicker-defined form stimulation in comparison with conventional perimetry and retinal nerve fiber measurements. Invest Ophthalmol Vis Sci. 2014;55:2317-2323.