30/01/2026
Limbal neovascularisation is a key sign of chronic corneal stress - and contact lens hypoxia is one of the most common causes. A structured assessment helps you identify early vessel growth, prevent progression and protect long-term corneal health.
What to evaluate
• Detailed contact lens history - lens material, dk value and wearing schedule
• Wearing pattern such as low dk daily disposable lenses worn 7 days a week for ~15 hours/day
• Symptoms of redness, dryness, irritation or reduced comfort
• Slit-lamp exam to assess extent, depth and quadrant involvement of vessels
• Signs of hypoxia - microcysts, limbal hyperaemia, corneal oedema
• Ocular surface and tear film status
• Documentation of progression with photos or drawingsKey differentials to rule out
• Contact lens-induced hypoxia
• Chronic ocular surface inflammation
• Limbal stem cell deficiency
• Previous keratitis or corneal scarring
• Dry eye disease or blepharitis
• Post-surgical corneal changes
Management approach
• Modify lens wear schedule and reduce daily wearing time
• Introduce lens-free days
• Switch to higher dk/t silicone hydrogel lenses
• Manage associated ocular surface disease
• Temporarily discontinue lens wear if vessels are progressing
• Refer if vessels approach the visual axis
Clear documentation and early counselling can prevent permanent corneal changes. Asira helps you record lens habits, clinical findings and follow-up clearly - supporting safer contact lens practice.