Comparison of near horizontal heterophoria tests in free space and with phoropter

• Autorzy: Perz-Juszczyszyn Katarzyna , Feltzke Monika , Dubas Katarzyna , Maples Willis Clem , Kołodziejczak Barbara , Buczkowska Hanna

Identyfikatory

DOI

10.37190/oa210204

• Języki publikacji: EN

Abstrakty

EN

Background: Measurements of phoria at near are important elements of the optometric assessment of binocular vision. It is important to know if different methods of measuring a phoria are interchangeable. This study was designed to compare phoria measures using in-phoropter (von Graefe) and in free space methods (Howell card). Methods: The study was conducted with 70 pre-presbyopic subjects, aged 23–35 years. Both near the von Graefe and near Howell card horizontal dissociated phorias along and with gradient +1.00 D and –1.00 D phorias were measured for each technique. Results: The mean values of the near dissociated phoria, for both test conditions (von Graefe and Howell card) showed a slight deviation in the two measures with von Graefe measures being generally more exophoric. The mean value of the phoropter phoria was 1.97 ∆ base-in and in free space, the value was 0.9 ∆ base-in. The phoropter phoria with the +1.00 D gradient was 5.24 ∆ base-in, and in free space, 2.73 ∆ base-in. Measurements of the phorometric phoria with a gradient of –1.00 D gave a mean of 0.42 ∆ base-out and 0.94 ∆ base-out in free space. The near phoria measures were significantly different for the basic near measure (p = 0.01) and for the +1.00 D gradient (p = 0.000002) but not for the –1.00 D measure (p = 0.36). Conclusion: The results of the differences in the near horizontal phoria in free space and in- phoropter were significantly different for the basic measure and for the +1.00 D gradient. The findings between the two methods of testing should therefore not be treated as equivalent or convertible. Each test method should have separate means and ranges established.

Słowa kluczowe

EN

Howell phoria card; near horizontal heterophoria; phoropter; Von Graefe test

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2021
• Tom: Vol. 51, nr 2
• Strony: 193--201
• Opis fizyczny: Bibliogr. 16 poz., rys., tab.

Twórcy

autor

Perz-Juszczyszyn Katarzyna

• Department of the Optometry, Chair of Ophthalmology and Optometry, Poznan University of Medical Sciences, 5D Rokietnicka St., 60-806 Poznań, Poland

autor

Feltzke Monika

• Department of the Optometry, Chair of Ophthalmology and Optometry, Poznan University of Medical Sciences, 5D Rokietnicka St., 60-806 Poznań, Poland

autor

Dubas Katarzyna

• Department of the Optometry, Chair of Ophthalmology and Optometry, Poznan University of Medical Sciences, 5D Rokietnicka St., 60-806 Poznań, Poland

autor

Maples Willis Clem

• Oklahoma College of Optometry at Northeastern State University, Tahlequah, Oklahoma USA
• Bellevue Specialty Eye Clinic, 7117 Highway 98 West, Suite 30 Hattiesburg, Mississippi 39402 USA

autor

Kołodziejczak Barbara

• Faculty of Mathematics and Computer Science, Adam Mickiewicz University, 4 Uniwersytetu Poznanskiego St., 61-614 Poznań, Poland

autor

Buczkowska Hanna

• Department of the Optometry, Chair of Ophthalmology and Optometry, Poznan University of Medical Sciences, 5D Rokietnicka St., 60-806 Poznań, Poland

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).