Tangent screen perimetry in the evaluation of visual field defects associated with ptosis and dermatochalasis

• Published in: PloS one 2017-03, Vol.12 (3), p.e0174607-e0174607
• Main Authors: Fuller, Molly L, Briceño, César A, Nelson, Christine C, Bradley, Elizabeth A
• Format: Article
• Language: English
• Subjects: Acuity; Arches; Biology and Life Sciences; Blepharoplasty - methods; Blepharoptosis; Blepharoptosis - physiopathology; Blepharoptosis - surgery; Burns; Cadmium; Care and treatment; Chin; Clearing; Colleges & universities; Comparative analysis; Complications and side effects; Cornea; Correlation; Correlation coefficient; Current carriers; Defects; Diagnosis; Documentation; Downloading; Editing; Engineering and Technology; Evaluation; Eye; Eyelid; Eyelids - physiopathology; Eyelids - surgery; Field study; Format; Glaucoma; Government programs; Guidelines; Health care; Humans; Illumination; Impairment; Jaw; Lighting; Medical personnel; Medicine and Health Sciences; Ophthalmology; Patients; People and Places; Photography; Physical Sciences; Plastic surgery; Postoperative Period; Posture; Preoperative Period; Prospective Studies; Quality of life; Reliability; Reproducibility of Results; Retina; Risk factors; Screens; Skin; Social Sciences; Surgeons; Surgery; Tangents; Technicians; Vision; Vision disorders; Vision Disorders - physiopathology; Vision Disorders - surgery; Vision, Ocular; Visual field; Visual Field Tests - methods; Visual Fields; Visual perception
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0174607

To determine if tangent visual fields gathered during assessment of superior visual field deficits caused by blepharoptosis and dermatochalasis offer good correlation to clinical exam in a time and cost efficient manner. Prospective, observational case series. Subjects included all patients referred to a single surgeon (CCN) who underwent surgical correction of blepharoptosis and/or dermatochalasis. Preoperatively and postoperatively, upper margin-to-reflex distances were assessed. Tangent visual fields were performed in a timed fashion and analyzed for degrees of intact vision in the vertical meridian and degrees squared of area under the curve. Data were compared by Student t-tests and Pearson correlation coefficients. Mean preoperative superior visual fields with the eyelid in the natural position measured 8° in the vertical meridian. Measurements in the vertical meridian and area under the curve showed excellent correlation (r = 0.87). Patients with ptosis showed strong correlation between margin-to-reflex distance and superior visual fields. Patients completed field testing faster than reported times for automated or Goldmann testing. Finally, tangent screens were the least expensive type of equipment to purchase. Tangent visual fields are a rapid and inexpensive way to test for functional loss of superior visual field in patients with upper eyelid malposition. Our data revealed potential differences between tangent screen results and published results for automated or Goldmann visual field testing which warrants further studies.