전체 글58 👁 What is Central Corneal Thickness (CCT)? 👁 What is Central Corneal Thickness (CCT)?CCT refers to the thickness of the central cornea,playing a critical role in refractive surgery screening and intraocular pressure (IOP) correction in glaucoma patients.🔍 Clinical Importance of CCTRefractive Surgery PlanningDetermines suitability and surgical safetyOverestimated CCT → Risk of overcorrection or ectasiaUnderestimated CCT → Patient wrongl.. 2025. 4. 19. Corneal Size & White-to-White (WTW) / Visible Iris Diameter (VID) 👁 Corneal Size & White-to-White (WTW) / Visible Iris Diameter (VID)The cornea makes up the anterior 1/6 of the eye,with a radius of approximately 8 mm, forming part of the eye's spherical structure.🔍 How is corneal size measured?From a front view, the horizontal distance from limbus to limbus (white sclera to white sclera)is termed White-to-White (WTW) or Visible Iris Diameter (VID).TermMeanin.. 2025. 4. 19. Axial Length of the Eye?, AXL, IOL master? A-scan, ultrascan 👁 What is Axial Length of the Eye?Axial Length (AXL) refers to the distance from the anterior corneal pole to the posterior scleral pole—essentially the front-to-back length of the eyeball. 🧬 Basic Eye AnatomyCornea (anterior 1/6):Radius: ~8mmSclera (posterior 5/6):Radius: ~12mmThe eye is a non-perfect sphere, composed of two fused spherical parts. 📏 Axial Length GrowthAgeAxial LengthAt bir.. 2025. 4. 19. Ocular Surface Stains + Staining Score Systems 👁 Ocular Surface Stains + Staining Score SystemsOphthalmic dyes likeFluorescein, Rose Bengal, and Lissamine Greenhelp visualize corneal and conjunctival damage in patients with dry eye and other surface disorders.🔍 Stain Color & Use SummaryDye NameColorUsed ForFluoresceinGreen (fluorescent)CorneaRose BengalPink/RedConjunctiva, devitalized cellsLissamine GreenGreenConjunctiva, dry eye assessmen.. 2025. 4. 19. SPEED Questionnaire, dry eye symptom, Standardized Patient Evaluation of Eye Dryness 👁 What is the SPEED Questionnaire?The SPEED (Standardized Patient Evaluation of Eye Dryness) is a self-assessment tooldesigned to measure symptoms of dry eye based on a patient's subjective experience.🔍 StructureThe SPEED test consists of 3 main components:Listing of symptoms (e.g., dryness, irritation, burning)Frequency ratingSeverity rating🧪 Scoring SystemFrequency (0 to 3 points per sympto.. 2025. 4. 19. Common Ocular Surface Dyes in Eye Examinations 👁 Common Ocular Surface Dyes in Eye ExaminationsIn ophthalmology, three major vital stains are used to assess the health of the corneal and conjunctival surfaces:🔸 Fluorescein🟢 Appears green under cobalt blue light🔶 The solution itself is orange-colored🧪 Used primarily to highlight corneal epithelial defects✅ Most common and essential in corneal staining 🔸 Rose Bengal🌺 A red dye, reminisc.. 2025. 4. 19. What is Spheroidal Degeneration of the Cornea (SDC)? What is Spheroidal Degeneration of the Cornea (SDC)?Spheroidal degeneration is a degenerative ocular condition characterized by the deposition of yellow-brown, globular proteinaceous material in the cornea and/or conjunctiva.The term “spheroidal” implies a nearly spherical but imperfectly round appearance.🔍 Alternate NamesClimatic Droplet Keratopathy (CDK)Bietti’s nodular degeneration, Fisherma.. 2025. 4. 19. Corneal Lipid Degeneration What is Corneal Lipid Degeneration?Corneal Lipid Degeneration refers to the accumulation of lipids (fats) in the cornea,which can lead to corneal opacities. It is classified into:Primary (idiopathic)Secondary (acquired) 🔹 Primary Lipid DegenerationExtremely rare; no identifiable underlying causeOccurs without corneal neovascularizationLipids deposit in both central and peripheral stromaBlood li.. 2025. 4. 18. Cornea Farinata symptom sign treatment What is Cornea Farinata?Cornea Farinata refers to a non-progressive corneal condition characterized byfine, flour-like specks located in the deep stromal layer near Descemet’s membrane.The name Farinata comes from the Latin word for flour.🔍 Key FeaturesFound in the posterior stroma, especially near Descemet’s membraneAppears as tiny, dust-like brown or white opacitiesBest visualized under retro.. 2025. 4. 18. Prev 1 2 3 4 5 6 7 Next
