1Flammer J, Orgül S, Costa VP, Orzalesi N, Krieglstein GK, et al. (2002) The impact of ocular blood flow in glaucoma. Prog Retin Eye Res 21:359-393.

2Nicolela MT, Walman BE, Buckley AR, Drance SM (1996) Ocular hypertension and primary open-angle glaucoma: a comparative study of their retrobulbar blood flow velocity. J Glaucoma 5:308-310.

3Mozaffarieh M, Grieshaber MC, Flammer J (2008) Oxygen and blood flow: players in the pathogenesis of glaucoma. Mol Vis14:224-233.

4Graham SL, Drance SM (1999) Nocturnal hypotension: role in glaucoma progression. Surv Ophthalmol 1:10-16.

5Bonomi L, Marchini G, Marraffa M, Bernardi P, Morbio R, et al. (2000) Vascular risk factors for primary open angle glaucoma: the Egna-Neumarkt Study. Ophthalmology 107 :1287-1293.

6Goldberg , Hollows FC, Kass MA, Becker B (1981) Systemic factors in patients with low-tension glaucoma. Br J Ophthalmol 65:56-62.

7 Drance S, Anderson DR, Schulzer M, et al. (2001) Risk factors for progression of visual field abnormalities in normal-tension glaucoma. Am J Ophthalmol 131:699-708.

8Gasser P, Flammer J (1991) Blood-cell velocity in the nailfold capillaries of patients with normal-tension and high-tension glaucoma. Am J Ophthalmol 111:585-588.

9 Choi J, Kim KH, Jeong J, Cho HS, Lee CH, et al. (2007) Circadian fluctuation of mean ocular perfusion pressure is a consistent risk factor for normal-tension glaucoma. Invest Ophthalmol Vis Sci 48:104-111.

10 Anderson DR (2011) Normal-tension glaucoma (Low-tension glaucoma). Indian J Ophthalmol 59 Suppl:S97-101.

11Araie M (1995) Pattern of visual field defects in normal-tension and high-tension glaucoma. Curr Opin Ophthalmol 6:36-45.

12Hayreh SS, Zimmerman B (2005) Visual field abnormalities in nonarteritic anterior ischemic optic neuropathy: their pattern and prevalence at initial examination. Arch Ophthalmol 123:1554-1562.

13Pelit A, Zumrutdal A, Akova Y (2003) The effect of hemodialysis on visual field test in patients with chronic renal failure. Curr Eye Res 26:303-306.

14Drance SM, Morgan RW, Sweeney VP (1973) Shock-induced optic neuropathy: a cause of nonprogressive glaucoma. N Engl J Med 288:392-395.

15Dunne FP, Barry DG, Ferriss JB, Grealy G, Murphy D (1991) Changes in blood pressure during the normal menstrual cycle. Clin Sci (Lond) 81:515-518.

16Higham JM, O'Brien PM, Shaw RW (1990) Assessment of menstrual blood loss using a pictorial chart. Br J Obstet Gynaecol 97 :734-739.

17Warner PE, Critchley HO, Lumsden MA, Campbell-Brown M, Douglas A, et al. (2004) Menorrhagia I: measured blood loss, clinical features, and outcome in women with heavy periods: a survey with follow-up data. Am J Obstet Gynecol 190:1216-1223.

18Zakherah MS, Sayed GH, El-Nashar SA, Shaaban MM (2011) Pictorial blood loss assessment chart in the evaluation of heavy menstrual bleeding: diagnostic accuracy compared to alkaline hematin. Gynecol Obstet Invest 71:281-284.

19Atkins EJ, Bruce BB, Newman NJ, Valerie Biousse (2010) Treatment of Nonarteritic Anterior Ischemic Optic Neuropathy. Survey of Ophthalmology 55:47-63.

20Sharma P, Sharma R (2011) Toxic optic neuropathy. Indian J Ophthalmol 59:137-141.

21 Hu S, Smith ND, Saunders LJ, Crabb DP (2015) Patterns of Binocular Visual Field Loss Derived from Large-Scale Patient Data from Glaucoma Clinics. Ophthalmology122: 2399-2406.

22 Nilforushan N, Yadgari M, Jazayeri A (2016) Comparison between visual field defect in pigmentary glaucoma and primary open-angle glaucoma. International Ophthalmology 36: 637-642.

23Gramer G, Weber BH, Gramer E (2015) Migraine and Vasospasm in Glaucoma: Age-Related Evaluation of 2027 Patients With Glaucoma or Ocular Hypertension. Invest Ophthalmol Vis Sci 56:7999-8007.

24Drance SM (1977) The visual field of low tension glaucoma and shock-induced optic neuropathy. Arch Ophthalmol 95: 1359-1361.