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Research Article | Volume 6 Issue 2 (None, 2020) | Pages 119 - 125
To Study the Efficacy of Ocular Hypotensive Drugs in Treatment of Ocular Hypertensive Patients at Teritary Care Hospital.
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 ,
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1
Associate Professor, Department of Ophthalmology, Rama Medical College Hospital & Research Centre, Kanpur, Uttar Pradesh. India.
2
Assistant Professor, Department of Ophthalmology, Mahavir Institute of Medical Sciences, Vikarabad, Telangana, India.
3
Assistant Professor, Department of Pharmacology, Zydus Medical College, Dahod, Gujarat, India.
4
Professor, Department of Community Medicine, Mahavir Institute of Medical Sciences, Vikarabad, Telangana, India.
Under a Creative Commons license
Open Access
Received
Nov. 8, 2020
Revised
Nov. 23, 2020
Accepted
Dec. 15, 2020
Published
Dec. 29, 2020
Abstract

Introduction:  Intraocular pressure (IOP) is regulated by the balance between the production and outflow of aqueous humor, with IOP homeostasis primarily maintained through adjustments in aqueous humor outflow resistance Methods A randomized, comparative study was conducted on 146 ocular hypertensive patients attending OPD at tertiary care hospital. All the patient demographical status, symptoms, prescription pattern, IOP were noted at baseline and after treatment was measured at 1st, 2nd and 3rd weeks. The observations and results were systematically tabulated and data were analyzed using SPSS software. An unpaired t-test and Anova test was used to determine statistical significance between all the groups. p value <0.05 considered statically significant and p <0.005 considered as highly significant. Results: Among 146 ocular hypertensive patient’s majority of the were male (65.75%) with in the age group of 36 to 40 years (32.87%) followed by 31 to 35 (26.02%) respectively. 116 (79.45%) having bilateral ocular hypertension. The patients having symptoms of pain 132 (90.41%), dryness of eye 124 (84.93%), redness of eye 98 (67.12%), Improper vision 74 (50.68%) and Headache 26 (17.80%) respectively. As per sociodemographic status having majority of the patients having myopia 114 (78.08%) with high blood pressure 97(66.43%) and diabetes mellitus 86 (58.90%) respectively. After treatment with ocular hypotensive drugs the majority of the patient shows significant reduction in IOP after 3 weeks of treatment with different classes of ocular hypotensive drugs p (<0.05) respectively Conclusion Ocular hypotensive drugs shows better improvement in IOP in ocular hypertensive patients. 

Keywords
INTRODUCTION

Ocular hypertension is characterized by an intraocular pressure (IOP) exceeding 21 mm Hg, accompanied by a normal optic nerve and visual field [1]. It contrasts with normal-pressure glaucoma, where progressive glaucomatous optic neuropathy occurs despite normal IOP levels [2]. The clinical spectrum ranging from ocular hypertension to normal-pressure glaucoma has been attributed to various factors, including individual differences in susceptibility to IOP-related glaucoma, the impact of arterial blood pressure on the optic nerve head, vasospastic factors, and others [3]

 

Recent studies have highlighted a physiological relationship between IOP, arterial blood pressure, and cerebrospinal fluid pressure (CSFP) [4]. Individuals with higher IOP tend to have higher arterial blood pressure and CSFP, and vice versa. These findings, along with the optic nerve head's anatomy as a pressure barrier between the intraocular compartment (IOP) and the retrobulbar compartment (CSFP), have led to the hypothesis that individuals with ocular hypertension may have relatively high CSFP. Conversely, low CSFP might contribute to the development of normal-pressure glaucoma [5 - 13].

 

In ocular hypertension, elevated CSFP may counteract increased IOP, maintaining the trans-lamina cribrosa pressure difference (TLCPD) within the normal range. To explore this hypothesis, a population-based study was conducted where CSFP was estimated using diastolic blood pressure, body mass index (BMI), and age [14, 15]. Previous research identified these parameters as significant determinants of CSFP in neurologically healthy individuals [16 - 17]. The present to now the prescription pattern of ocular hypotensive drug in ocular hypertensive patients

METHODS

The study was conducted in the outpatient of department of ophthalmology at tertiary care hospital. The study was carried out a period after 3 weeks for a period of two years. Written informed consent form was taken from the patients. After taking inform consent, past and present history of the patients was taken.

 

Inclusion Criteria

  1. Patients aged group between 10–40 years attending the OPD at tertiary care hospital.
  2. Patients able to adhere to the follow-up schedule.
  3. Patients ready to give inform consent
  4. Patient having financial support for buying medicine.
  5. Patients not on any ocular drugs.

Exclusion Criteria –

  1. Patients less than 10 years of age.
  2. Patient waring contact lens during the study period.
  3. Patients having or had active ocular infections or pathological conditions.
  4. Patients with any ocular disorders.
  5. History of ocular surgery within the past 3 months.
  6. Patient or patient attendant not ready to give inform consent form.
  7. Patient taking ocular drug that is used for the study.

 

The clinical eye examination was done on all 152 patients among them 146 patients were included in the study 6 patients missed form the study. The demographical status, symptoms, bilateral and unilateral hypertension, prescription pattern of oral hypotensive drug and intraocular pressure were noted

 

Statistical Analysis:

The data collected form the OPD were noted and tabulated in MS Excel sheet and data was analyzed by using SPSS Software version 16. Unpaired t test or One-way Anova was conducted with all five classes of ocular hypotensive drug. p value less than 0.05 stated as statically significant and p value less than 0.005 stated as highly statically significant. 

RESULTS

Among 146 patients with ocular hypertension, the majority were male (65.75%) (Table 1) and predominantly aged 36–40 years (32.87%), followed by those aged 31–35 years (26.02%) (table 2)

A significant proportion, 116 patients (79.45%), presented with bilateral ocular hypertension (Table 3). Common symptoms included pain in 132 patients (90.41%), dryness in 124 (84.93%), redness in 98 (67.12%), impaired vision in 74 (50.68%), and headache in 26 (17.80%) (Table 5).

In terms of sociodemographic factors, most patients had myopia (114, 78.08%), along with coexisting high blood pressure (97, 66.43%) and diabetes mellitus (86, 58.90%) (table 4).

For the treatment with ocular hypotensive drugs resulted in a significant reduction in IOP after three weeks, with various drug classes showing effectiveness (p < 0.05) (Table 6).

 

Table 1 Gender decimation among ocular hypertensive patients.

Gender

No of patients

Percentage No of Patients

Male

96

65.75

Female

50

34.24

Total No of patients

146

100.00

 

Table 2 Distribution of age group among ocular hypertensive patients.

Age distribution (years)

No of patients

Percentage no of patients

10 to 15

05

03.45

16 to 20

11

07.53

21 to 25

20

13.69

26 to 30

24

16.43

31 to 35

38

26.02

36 to 40

48

32.87

Total No of patients

146

100.00

 

Table 3 Type of Ocular Hypertension observed in ocular defect patients.

Type of Ocular Hypertension

No of Patients

Percentage No of patients

Bilateral HT

116

79.45

Unilateral HT

30

20.54

Total No of Patients

146

100.00

 

Table 4: Sociodemographic status in patients with Ocular Hypertensive patients

Sociodemographic status

Yes

No

Family history of glaucoma

25 (17.12)

121 (82.87)

Migraine

34 (23.28)

112 (76.71)

Diabetes mellitus

86 (58.90)

60 (41.09)

High blood pressure

97 (66.43)

49 (33.56)

Low blood pressure

29 (19.86)

117 (80.13)

Heart disease

103 (70.54)

43 (29.45)

Myopia

114 (78.08)

32 (21.91)

 

Figure 01: Graphical representation in percentage number of patients having changes in sociodemographic status in ocular hypertensive patients.

 

Table 4 Symptoms observed in ocular hypertensive patents.

Symptoms

No of patients

Percentage no of patients

Pain

132

90.41

Redness of eyes

98

67.12

Dryness of eye

124

84.93

Headache

26

17.80

Improper vision

74

50.68

Total no of patients

146

 

 

Figure 02 percentage difference in symptoms observed in ocular hypertensive patients.

 

Table 05 Number of patients developed glaucoma.

Development of disease

No of patients

Percentage no of patients

Development of glaucoma

28

19.17

No development of glaucoma

118

80.82

Total no of patients

146

100.00

 

Table 06 prescription pattern of ocular hypotensive drugs in treatment of ocular hypertensive patients.

Drugs

No of patients

Percentage no of patients

Prostaglandins

08

05.47

Beta blockers

41

28.08

Alpha adrenergic drugs

18

12.32

Carbonic anhydrate inhibitors

25

17.12

Miotic or cholinergic agents

54

36.98

Total No of patients

146

100.00

 

Figure 03 Prescription pattern of percentage use in ocular hypotensive patients.

Table 07: Changes in IOP Before and after treatment with different classes of oral hypotensive drugs.

Drug Groups

Baseline

After1 Wk.

After 2 Wks.

After 3 Wks.

PGs

28.12±0.88

24.18±0.94

21.16±0.19

19.12±0.15

Beta Blockers

26.15±1.89

24.18±1.64

21.15±1.42

18.18±1.28

Antiadrenergic drugs

25.18±1.62

22.48±1.42

18.48±1.26

15.16±0.86

Carbonic anhydrase inhibitors 

26.19±1.76

24.26±1.16

20.46±0.89

17.46±0.64

Miotic drugs

27.62±1.92

24.48±1.62

20.16±1.42

16.89±1.02

 

Table 08 Mean difference between baseline and after treatment in patients with ocular hypotensive.

Drug Groups

Baseline vs 1st week

Baseline vs 2nd week

Baseline vs 3rd week.

PGs

3.94±0.88

6.96±0.83

9.00±0.87

Beta Blockers

1.97±0.25

5.00±0.47

7.97±0.61

Antiadrenergic drugs

2.70±0.20

6.06±0.36

10.02±0.76

Carbonic anhydrase inhibitors 

1.93±0.60

5.73±0.87

08.73±1.12

Miotic drugs

3.14±0.30

7.46±0.50

10.73±0.90

 

Figure 04 Graphical representation of mean average reduction in IOP After treatment with different ocular hypotensive drugs.

DISCUSSION

Ocular Hypertensive is a disease of eye causing rise in intraocular pressure causing effect on single eye or both eyes. As per the present research the majority of the patient were male 96 (65.75%) followed by female 50 (34.24%) respectively (table 01) with the age group of 36 to 40 years 48 (32.87%) followed by 31 to 35 38 (26.02%) respectively (Table 2). The patient having bilateral hypertensive among 116 (79.45%) followed by unilateral HT 30 (20.45%) respectively. The sociodemographic status majority of the patients having myopia 114 (78.08%), high blood pressure 97 (66.43%) and diabetes mellitus 86 (58.90%). The patient had symptoms of pain in eyes 132 (90.41%), dryness of eye 124 (84.93%), redness of eyes 98 (67.12%), improper vision 74 (50.68%) and headache 26 (17.80%) respectively. 28 (19.17%) developed glaucoma and 118 (80.82%) does not developed glaucoma. The ocular hypertensive patients were divided into five groups group A patients treated with prostaglandins, group B treated with beta blockers, group C patients were treated with antiadrenergic drugs, group D patients treated with carbonic anhydrase inhibitors and group E patients treated with miotic drugs Majority of the patients were treated with Ocular hypotensive eye drops like miotic drug in 36.98% followed by beta blockers in 41 (28.08%), carbonic anhydrase inhibitors 25 (17.12%), alpha adrenergic drug 18 (12.32%) and prostaglandins 08 (05.47%) respectively. The mean average IOP were measured in all five groups. after 1st & 2nd week of treatment there is no significant reduction in intraocular pressure but at 3rd week of treatment there is a significant reduction in intraocular pressure in all five groups (p<0.05) respectively but the mean average improvement was seen in group E 10.73 ±0.90 followed by group c 10.02 ± 0.36 respectively.

 

According to Mae O. Gordon (1999) [18], the intraocular pressure among enrolled subjects was high enough to adequately assess the potential benefits of ocular hypotensive medications in preventing or delaying glaucomatous damage. The significant number of African American participants included in the study offers a reliable estimate of their response to topical medications.

 

David S. Friedman (2004) [19] noted that only a subset of patients with ocular hypertension eventually progresses to glaucoma. Determining whether to initiate therapy and the appropriate intensity of treatment can be challenging and requires a thorough understanding of the relative significance of risk factors for disease progression. This review evaluates the strength of evidence behind reported risk factors and provides insights that may aid in assessing individual patient risk for progression.

CONCLUSION

Ocular hypertension is an eye condition characterized by increased intraocular pressure (IOP). Research studies indicate that all classes of ocular hypotensive drugs effectively reduce IOP in patients with ocular hypertension. This drugs may also help to prevent the for other development of glaucoma.

REFERENCES
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  3. Tezel G, Hernandez R, Wax MB (2000) Immunostaining of heat shock proteins in the retina and optic nerve head of normal and glaucomatous eyes. Arch Ophthalmol 118: 511–518. 
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  7. Morgan WH, Yu DY, Cooper RL, Alder VA, Cringle SJ, et al. (1995) The influence of cerebrospinal fluid pressure on the lamina cribrosa tissue pressure gradient. Invest Ophthalmol Vis Sci 36: 1163–1172. 
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