Eye Health Library
Understand your eyes.
Choose care with clarity.
A practical guide to common eye diseases, warning symptoms, diagnosis and treatment options. Use it to prepare for a consultation—not to replace one.
Vision Plus patient guide
22
conditions explained in plain language
Symptoms · diagnosis · treatment · next steps
Important: Eye symptoms can have different causes. Sudden loss of vision, a curtain or shadow, new flashes with many floaters, severe pain or chemical injury needs same-day eye care.
Contents
22 Eye Diseases and Conditions
Select a condition to jump to its guide. Where a full clinical page is available, you can open the specialist guide for more questions and follow-up information.
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Super-Specialty Eye Care
Advanced options for clearer vision
Technology matters when it improves a clinical decision. Our refractive specialists compare options around your cornea, eye health, work and expectations.
WaveLight® Plus InnovEyes
AI-powered, personalised vision correction
A premium laser vision correction pathway using detailed measurements, ray-tracing planning and individualised treatment design. It is intended for carefully selected patients after a complete suitability evaluation.
- US-FDA approved platform
- 3D digital eye and ray-tracing planning
- Customised treatment approach
- Suitability confirmed only after examination
Read about suitability →
SILK
Flap-free laser vision correction
A minimally invasive, flap-free option for selected spectacle powers. Your corneal thickness, shape, tear film and lifestyle determine whether SILK or another option is safer for you.
- No corneal flap
- Small-incision approach
- Personalised power range assessment
- Structured post-procedure follow-up
Read about suitability →
LASIK & ICL
More than one route to clear vision
LASIK, surface procedures and ICL each have different suitability criteria. A transparent work-up helps you compare expected vision, recovery, risks and long-term care before deciding.
- Corneal and retinal screening
- Options for different spectacle powers
- Lifestyle-led counselling
- No procedure without suitability
Read about suitability →
Detailed condition guides
Start with the right questions
These guides cover the conditions shown first in the reference material. Costs are indicative where shown and must be confirmed after examination and lens or procedure selection.
Myopia, or short-sightedness, causes distant objects such as road signs, classroom boards and television text to appear blurred. It usually happens when the eye is longer than average or focuses light in front of the retina.
Symptoms
- Blurred distance vision
- Squinting to see clearly
- Headaches after distance work
- Night-time glare or difficulty driving
- Children sitting very close to screens or boards
How it is diagnosed
- Visual acuity and refraction
- Cycloplegic refraction for children
- Eye health and dilated retinal examination
- Corneal mapping if laser correction is being considered
Treatment options
Glasses and contact lenses provide safe, effective correction. Suitable adults may discuss LASIK, surface procedures or ICL only after a complete corneal, tear-film and retinal assessment. Children need regular power and eye-health reviews.
Astigmatism is an uneven curve of the cornea or natural lens. Instead of focusing light to one sharp point, the eye forms a stretched focus, which can make letters look shadowed or lights look star-shaped.
Symptoms
- Blur at distance, near or both
- Shadowing around letters
- Eye strain and headaches
- Squinting or frequent blinking
- Glare around lights at night
How it is diagnosed
- Manifest and objective refraction
- Corneal topography or tomography
- Slit-lamp examination
- Retinal and eye-pressure assessment when indicated
Treatment options
Cylindrical spectacle power, toric contact lenses or specialty lenses may improve focus. Laser vision correction is considered only when corneal measurements and overall eye health show that it is appropriate.
Presbyopia affects almost everyone as the natural lens loses its ability to change focus for near work. Reading menus, mobile text and fine print may become difficult, especially in dim light.
Symptoms
- Holding reading material farther away
- Needing brighter light to read
- Near blur and eye fatigue
- Headaches after close work
- Slow refocusing between distance and near
How it is diagnosed
- Distance and near vision testing
- Refraction for reading and distance needs
- Slit-lamp examination
- Eye-pressure and dilated eye-health review when appropriate
Treatment options
Reading glasses, bifocals, progressive lenses or contact-lens options can be chosen around work and lifestyle. Lens replacement or presbyopia-correcting surgery requires a detailed discussion of benefits, limitations and alternatives.
Indicative cost guideWhat may be involved
Actual cost depends on the examination, lens or procedure selected, and the care plan advised by your ophthalmologist.
- Reading glasses₹1,000–₹3,000
- Bifocal or progressive lenses₹2,000–₹6,000
- Contact lenses₹1,500–₹4,000 per pair
- Lens replacement surgery₹40,000–₹1,20,000 depending on IOL type
Keratoconus is a progressive eye disease where the cornea thins and bulges outward into a cone shape, distorting vision. Light scatters, causing blur, glare and halos that glasses may not fully correct.
Symptoms
- Frequent change in spectacle power
- Irregular astigmatism
- Blur that glasses cannot fully correct
- Glare and halos around lights
- Eye rubbing or allergy-related itching
How it is diagnosed
- Corneal topography and tomography
- Pachymetry to measure corneal thickness
- Refraction and best-corrected vision
- Slit-lamp examination
- Serial mapping to check progression
Treatment options
Allergy control and stopping eye rubbing are important. Glasses or specialty contact lenses may improve vision. Corneal cross-linking can slow documented progression; advanced cases may need ring segments or corneal transplantation.
Indicative cost guideWhat may be involved
Actual cost depends on the examination, lens or procedure selected, and the care plan advised by your ophthalmologist.
- Corneal mapping and evaluationConfirmed after examination
- Corneal cross-linkingDiscussed after progression and corneal suitability are confirmed
- Specialty contact lensesVaries by lens design and fitting needs
- Advanced corneal proceduresIndividual estimate after specialist assessment
More condition guides
A symptom is a starting point
Explore the remaining topics below. Each card connects to a focused guide when the clinical content is available.
05
Ocular SurfaceRed Eyes
Redness can be caused by infection, allergy, dryness or irritation.
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06
RetinaDiabetic Retinopathy
Diabetes-related retinal changes that can develop without early symptoms.
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07
RetinaRetinal Detachment
A sight-threatening separation of the retina that needs urgent assessment.
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08
RetinaEye Floaters
Spots, cobwebs or shadows that move across your field of vision.
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09
Ocular SurfaceAllergic Conjunctivitis
Itchy, watery and red eyes triggered by an allergic response.
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10
Specialist Eye CareEye Cancer
Rare tumours affecting the eyelid, eye surface or structures inside the eye.
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11
Vision SymptomBlurred Vision
A symptom with many possible causes, from a power change to retinal disease.
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12
RetinaMacular Degeneration
Macular changes that affect detailed central vision and reading.
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13
Children & NeuroLazy Eye (Amblyopia)
Reduced visual development in one eye, often linked with childhood squint or power.
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14
Vision CorrectionAnisometropia
A significant difference in spectacle power between the two eyes.
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15
Vision CorrectionHyperopia
Long-sightedness that may cause near strain, blur or headaches.
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16
General Eye HealthYellow Eyes
Yellowing of the eye white that should be assessed with general health symptoms.
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17
Urgent Eye CareEye Injury
Trauma, chemical exposure or a foreign body can threaten the eye quickly.
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18
Lens & VisionAphakia
Absence of the natural lens after surgery, injury or a rare childhood condition.
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19
Ocular SurfaceDry Eye Syndrome
An unstable tear film causing burning, grittiness, watering or fluctuating blur.
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20
Vision SymptomTired Eyes
Eye strain associated with screens, prolonged near work, uncorrected power or dryness.
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21
OculoplastyBags Under Eyes
Puffiness beneath the eyes related to anatomy, ageing, fluid retention or allergy.
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22
CorneaCorneal Blindness
Severe corneal scarring or opacity that blocks the passage of light.
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Patient guide
What should you do next?
01
What to Do if You Have Symptoms of an Eye Disease?
Do not self-diagnose from a symptom alone. Note when it started, whether one or both eyes are affected, and whether vision is worsening. Bring your glasses, contact lenses, medicines and previous reports to an ophthalmologist.
02
How are Eye Diseases Diagnosed?
A consultation may include visual acuity, refraction, eye-pressure testing, slit-lamp examination and a dilated retina check. OCT, corneal mapping, visual fields, photography or blood tests are selected only when they add useful information.
03
What are the Treatment Options for Eye Diseases?
Treatment depends on the cause and stage. Options may include observation, glasses, contact lenses, lubricants, prescribed medicines, laser procedures, injections or surgery. Your doctor should explain expected benefit, alternatives, risks and follow-up.
04
How to Prevent Eye Diseases?
Have regular examinations, protect eyes from injury and UV exposure, avoid rubbing, remove contact lenses as instructed, control diabetes and blood pressure, and take screen breaks. Children need timely checks because vision development has a limited window.
05
When should You See an Ophthalmologist for Eye Diseases?
Arrange prompt care for persistent blur, pain, redness, discharge, light sensitivity or a new change in vision. Seek same-day help for sudden sight loss, a curtain or shadow, flashes with many floaters, chemical injury or severe pain.
06
What are the Risks of Untreated Eye Diseases?
Some conditions remain stable, but others can cause avoidable scarring, amblyopia, pressure damage, retinal damage or permanent sight loss. Early assessment does not always mean surgery—it gives you a safer choice about what to do next.
07
How to Find the Right Eye Care Specialist Near You?
Choose a registered ophthalmologist with experience in the relevant part of the eye, access to the tests you may need and a clear follow-up process. Vision Plus Eye Centre has specialist-led care at Sector 51, Noida and Noida Extension.
Need a personalised answer?
Let an ophthalmologist connect the symptoms to the right test.