Dr. Pratyush Ranjan
Consultant · Cataract, Refractive & Glaucoma
Medical Director · ASG Superspeciality Eye Hospital, Mahmoorgunj, Varanasi
Regional Chief Operating Officer · ASG Eye Hospitals, Uttar Pradesh
Understand your glaucoma — and how to keep your sight
Step 1/7
You can protect your sight

Glaucoma is serious — but with the right treatment, most people keep useful vision for life.

Glaucoma quietly damages the optic nerve, and lost vision cannot be recovered. The good news: lowering eye pressure slows or stops it. This tool uses well-known research to estimate your risk of vision loss, and to show which treatment approach protects you best.

Have your recent glaucoma report handy if you can — eye pressure (IOP), OCT / nerve-fibre (RNFL) status, and visual-field (perimetry) result. Don't have the numbers? You can still continue; we'll measure everything at your visit.

About you

A little about you

Please enter an age between 10 and 100.
Your diagnosis

What kind of glaucoma were you told you have?

If you're unsure, pick "Not sure" — we'll confirm it at your visit.

Please choose one.
Eye pressure

Your eye pressure (IOP)

From your report, in mmHg. Normal is about 12–21. Higher pressure — and pressure far above your target — drives faster damage. Skip if you don't know; we'll measure it.

IOP should be between 5 and 70 mmHg.
Nerve & field status

How much damage is there already?

The amount of damage at this moment is the single biggest clue to your future — this is why regular fields and OCT matter. Choose what your doctor told you, or your best sense of it.

Please answer both.
Other factors

A few things that change the odds

Be honest — this is the single factor most in your control, and it hugely changes the outcome.

Please answer both.
Next step

Book your glaucoma review with Dr. Pratyush

A full check — pressure, angle, OCT and visual field — sets your personal target pressure and confirms the right treatment. Your answers travel with your booking.

Scientific basis of this tool
  1. Peters D, Bengtsson B, Heijl A. Lifetime risk of blindness in open-angle glaucoma. Am J Ophthalmol 2013 — bilateral blindness ~1 in 6 over a lifetime; ~26.5% one-eye blindness at 10y, 38.1% at 20y.
  2. Heijl A et al. Early Manifest Glaucoma Trial (EMGT). Arch Ophthalmol 2002 — each 1 mmHg of IOP lowering cut progression risk ~10%.
  3. Gazzard G et al. LiGHT Trial (Lancet 2019; 6-yr results Ophthalmology 2022) — SLT as first-line: ~70% drop-free control at 6y, less progression and less surgery than drops-first.
  4. The AGIS Investigators 2000; low, stable IOP associated with less field progression — target-pressure principle.
  5. Kass MA et al. Ocular Hypertension Treatment Study (OHTS) — treating raised pressure roughly halved conversion to glaucoma.
  6. AAO Primary Open-Angle Glaucoma & Angle Closure Preferred Practice Patterns, 2020 — severity staging and treatment escalation; LPI for angle-closure.
  7. Azuara-Blanco A et al. EAGLE trial. Lancet 2016 — in angle-closure patients aged 50+ without cataract, clear-lens extraction gave better IOP control, quality of life and far less need for further surgery than laser iridotomy; a first-line option.
  8. Peripheral anterior synechiae involving much of the angle: primary trabeculectomy lowers IOP more than LPI in advanced PACG (Ophthalmology studies).

This tool gives an educational estimate only, not a diagnosis or treatment decision. Glaucoma risk depends on many factors that can only be assessed in person. Your treatment and target pressure are decided by Dr. Pratyush Ranjan after full examination. Never stop or change your drops based on this tool.