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Understanding Glaucoma

Glaucoma is a group of eye conditions in which damage to the optic nerve is usually related to elevated pressure inside the eye (intraocular pressure), leading to gradual and permanent loss of vision. The most common form, primary open‑angle glaucoma, progresses slowly and without pain, so patients often do not notice any problem until a large amount of side vision is already lost.

Types of Glaucoma We Treat

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Open‑Angle Glaucoma

Most common, slow progression

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Angle‑Closure Glaucoma

Emergency condition, rapid onset

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Normal‑Tension Glaucoma

Damage despite normal pressure

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Congenital Glaucoma

Present at birth or early childhood

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Secondary Glaucoma

Due to injury, disease, or medications

Acute Angle‑Closure

Medical emergency requiring immediate treatment

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Glaucoma Risk Factors

Certain factors increase the likelihood of developing glaucoma. Regular screening is especially important for individuals with one or more of these risk factors.

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Age Over 40

Risk increases significantly after age 40, and continues to rise with each decade

High Risk
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Family History

Having a parent or sibling with glaucoma increases your risk 4‑9 times

High Risk
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High Eye Pressure

Elevated intraocular pressure is the most significant controllable risk factor

High Risk
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Severe Myopia/Hyperopia

Extreme nearsightedness or farsightedness increases glaucoma risk

Moderate Risk
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Long‑term Steroid Use

Prolonged corticosteroid use can elevate eye pressure

Moderate Risk
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Diabetes & Hypertension

Systemic conditions that affect blood flow to the optic nerve

Moderate Risk
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Ethnicity

African, Hispanic, and Asian ancestry have higher predisposition

Elevated Risk
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Previous Eye Injury

Trauma can damage drainage system and increase pressure

Elevated Risk
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Emergency Warning: Acute Angle‑Closure Glaucoma

If you experience sudden eye pain, headache, nausea, vomiting, blurred vision, or halos around lights, seek immediate medical attention. This is a medical emergency that can cause permanent vision loss within hours.

Emergency Hotline: +91 98765 43210
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Diagnosis & Screening

Glaucoma diagnosis requires a combination of tests rather than a single reading, because some patients have damage with normal pressure and others have high pressure without damage. At Rameshwaram Netralaya, a complete glaucoma work‑up includes multiple painless, outpatient procedures.

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Tonometry

5 min

Measures intraocular pressure (IOP) - raised IOP is a major risk factor for glaucoma, but normal values do not rule out the disease.

Purpose: Pressure measurement
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Optic Nerve Examination

10 min

The doctor evaluates the optic nerve head for thinning, cupping and structural changes using slit‑lamp lenses and optical coherence tomography (OCT).

Purpose: Structural assessment
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Visual Field Testing

15‑20 min

A computerized test that maps peripheral vision to detect characteristic glaucoma‑related blind spots and monitor progression over time.

Purpose: Functional assessment
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Gonioscopy

5 min

A special mirrored lens is used to view the drainage angle where fluid exits the eye, helping distinguish open‑angle from angle‑closure glaucoma.

Purpose: Angle assessment
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Pachymetry

2 min

Measures central corneal thickness which influences how pressure readings are interpreted and is included in overall risk assessment.

Purpose: Corneal thickness measurement
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OCT & Imaging

10 min

High‑resolution imaging of the optic nerve and retinal nerve fiber layer for precise measurement and tracking of structural changes.

Purpose: Advanced imaging
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Laser Treatments for Glaucoma

Laser therapy is an important part of modern glaucoma management and can be used as primary treatment or when drops alone are insufficient. It's important to understand that laser does not "cure" glaucoma; it is one tool among drops and surgery to keep eye pressure within a safe range.

Selective Laser Trabeculoplasty (SLT)

Most Common
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For: Open‑angle glaucoma and ocular hypertension

Procedure: Low‑energy laser pulses target pigmented cells in the trabecular meshwork, enhancing fluid outflow

Recovery: Minimal discomfort, quick recovery, typically outpatient

Duration: 10‑15 minutes per eye

Benefits:
  • Reduces or eliminates need for eye drops
  • Repeatable if needed
  • Minimal side effects
  • Can be combined with cataract surgery

Argon Laser Trabeculoplasty (ALT)

Established Technique

For: Open‑angle glaucoma where SLT may not be suitable

Procedure: Thermal laser treats trabecular meshwork to increase aqueous outflow

Recovery: Quick return to normal activities

Duration: 5‑10 minutes per eye

Benefits:
  • Well‑established track record
  • Effective pressure reduction
  • Clinic‑based procedure
  • Minimal downtime

Cyclophotocoagulation

Advanced Cases
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For: Advanced or refractory glaucoma cases

Procedure: Laser applied to reduce fluid production by partially treating the ciliary body

Recovery: May require more recovery time than SLT/ALT

Duration: 15‑30 minutes

Benefits:
  • Effective for difficult‑to‑control glaucoma
  • Can avoid more invasive surgery
  • Repeatable treatment option
  • Reduces medication burden
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Surgical Options

If medications and laser treatments cannot adequately control eye pressure, or if very low target pressure is needed to protect the optic nerve, glaucoma surgery may be recommended. The goal of surgery is to slow or stop further damage, not to restore vision that has already been lost.

Minimally Invasive Glaucoma Surgery (MIGS)

Innovative

MIGS procedures use tiny incisions and microscopic devices to enhance fluid outflow with less tissue disruption and faster recovery time than traditional surgery. They are often combined with cataract surgery in mild to moderate glaucoma.

Duration: 20‑40 minutes (with cataract surgery)
Recovery: 1‑2 weeks
Success Rate: 70‑80% pressure reduction
Ideal For:
  • Mild to moderate glaucoma
  • Patients undergoing cataract surgery
  • Those wanting to reduce medication use
  • Patients seeking quicker recovery

Trabeculectomy

Gold Standard

Trabeculectomy creates a new drainage pathway under the conjunctiva, allowing fluid to leave the eye more easily and form a small reservoir ("bleb"), thereby lowering IOP. It is a well‑established operation used in more advanced glaucoma.

Duration: 45‑60 minutes
Recovery: 4‑6 weeks
Success Rate: 60‑80% at 5 years
Ideal For:
  • Moderate to advanced glaucoma
  • When target pressure is very low
  • Patients with progressive damage despite treatment
  • Those intolerant to medications

Glaucoma Drainage Devices

Complex Cases

Tube shunts and other drainage implants divert fluid from inside the eye to an external reservoir, helping control pressure when trabeculectomy is unsuitable or has failed. These surgeries are generally reserved for complex or advanced cases.

Duration: 60‑90 minutes
Recovery: 6‑8 weeks
Success Rate: 70‑80% at 2 years
Ideal For:
  • Failed trabeculectomy
  • Neovascular glaucoma
  • Uveitic glaucoma
  • Traumatic glaucoma
  • Congenital glaucoma
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Important: The glaucoma specialist at Rameshwaram Netralaya will design an individual plan—using eye drops, laser, surgery or a combination—based on disease stage, age, general health and lifestyle, with the shared goal of preserving useful vision for as long as possible.

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Medication Management

Eye drops are usually the first treatment for glaucoma. They work by either reducing the amount of fluid produced in the eye or improving its outflow. Proper and consistent use is crucial for effective pressure control.

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Prostaglandin Analogs

Examples: Latanoprost, Bimatoprost, Travoprost

Action: Increase fluid outflow

Frequency: Once daily at bedtime

Most Effective Once Daily Well Tolerated
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Beta‑Blockers

Examples: Timolol, Betaxolol

Action: Reduce fluid production

Frequency: Once or twice daily

Long History Cost‑Effective Twice Daily
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Alpha‑Agonists

Examples: Brimonidine, Apraclonidine

Action: Reduce production & increase outflow

Frequency: Twice or three times daily

Dual Action Neuroprotective Allergy Possible

Carbonic Anhydrase Inhibitors

Examples: Dorzolamide, Brinzolamide

Action: Reduce fluid production

Frequency: Twice or three times daily

Add‑on Therapy Oral Form Available Burning Sensation

Proper Eye Drop Technique

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Wash hands thoroughly before handling drops
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Tilt head back and pull lower eyelid down to form a pouch
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Place drop in pouch without touching eye or eyelid with bottle
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Close eye gently for 1‑2 minutes after instillation
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Wait 5 minutes between different eye medications