Abstract
In 19 healthy volunteers (9 men, 10 women) we studied the effect of drinking 1000 ml of water within 10 min on aqueous humor dynamics. Fluorescein was applied topically five times, 6 h before measurements. All readings were taken during the afternoon. The Wilcoxon signed-rank test was used to evaluate the statistical relevance of the data. Aqueous humor flow was measured 60 min before (F1) and 10 min (F2), 30 min (F3), 60 min (F4) and 90 min (F5) after drinking 11 of water. Flow (mean ± SD) changed as follows: F1, 2.25 ± 1.2 μll/min ; F2, −3.29 ± 3.4 μ/min (P < 0.0000); F3, 1.69 ± 1.0 gml/min (P=0.007); F4, 2.39±0.9 μl/min (P=0.25); F5, 2.64±0.9 μl/min (P=0.02). Three to four days later the identical procedure was performed in each individual: F1, 2.06 ± 1.0 μl/min F2, −3.12 ± 2.4 μl/min (P < 0.0000); F3, 1.09 ± 0.6 μl/min (P < 0.0001); F4, 1.76 ± 0.6 μl/min (P=0.15); F5, 2.54±0.8 μl/min (P=0.01). The correlation coefficient for the left and night eyes (F1–F5, both days) was r=0.85. The mean flow in the 19 healthy volunteers during the afternoon hours was 2.25 ± 1.0 μl/min. Water load consistently led to a reflux of unbound fluorescein into the eye about 10 min later. This is documented as a negative flow. Ninety minutes after drinking 1000 ml of water there is a significant increase in flow, which is in contrast to the normal diurnal curve of aqueous humor dynamics. Water load causes hydremia and an increase in episcleral venous pressure. Fluorophotometry together with water load may be useful to study the aqueous humor dynamics in healthy and glaucomatous eyes and eyes with ocular hypertension.
Similar content being viewed by others
References
Jones RF, Maurice DM (1966) New methods of measuring the rate of aqueous humor flow in man with fluorescein. Exp Eye Res 5:208–220
Lauber JK, Boyd TA, Kinnear A (1979) The water provocative test in preglaucomatous chickens. Can J Ophthalmol 14:176–180
Leydhecker W (1950) The waterdrinking test. Br J Ophthalmol 34:457–479
Maurice DM (1963) A new objective fluorophotometer. Exp Eye Res 2:33–38
Maurice DM (1967) The use of fluorescein in ophthalmic research. Invest Ophthalmol Vis Sci 6:464–477
Mehra KS (1979) Water drinking provocative test. Ann Ophthalmol 11:223–224
Norskov K (1967) The water provocative test. Acta Ophthalmol 45:57–67
Rasmissa KE, Jorgensen HA (1976) Diagnostic value of the water-drinking test in early detection of simple glaucoma. Acta Ophthalmol 54:160–166
Roth JA (1974) Inadequate diagnostic value of the water-drinking test. Br J Ophthalmol 58:55–61
Thiel R (1925) Die physiologischen und experimentell erzeugten Schwankungen des intraokularen Drucks im gesunden und in glaukomatösen Augen. Archiv für Augenheilkunde 96:331–354
Vucicevic ZM, Scheie HG, Berry A, Yaros M, Frauenhoffer C (1975) The importance and accuracy of the water drinking test and tonography. Ann Ophthalmol 7:39–45
Warter G, Jeannenot N (1991) Increased intraocular pressure provoked by a water test. Ophthalmologica 252:75–80
Zeimer RC (1993) A practical venomanometer. Arch Ophthalmol 101:1447–1452
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Diestelhorst, M., Krieglstein, G.K. The effect of the water-drinking test on aqueous humor dynamics in healthy volunteers. Graefe's Arch Clin Exp Ophthalmol 232, 145–147 (1994). https://doi.org/10.1007/BF00176783
Received:
Revised:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00176783