Women with premature ovarian failure (POF) are at risk for dry eye. In addition, some women with Turner syndrome (TS) report dry eye symptoms. This study will determine how many women with TS have dry eye, compared to women with POF and women without these conditions. Females 16 years of age and older with TS, POF, or neither of these conditions may be eligible for this study. Participants undergo the following tests and procedures: - Medical history: Subjects are asked about their current and previous medical conditions and treatments they have had in the past. They complete forms with information about how their eyes feel and if dry eye has bothered them. - Assessment of tears and eye surface: The amount of tears the eyes can produce is measured by placing a small piece of sterile paper in the corner of the eye for 5 minutes. Orange and green dyes are also placed in the eyes to determine the health of the surface of the eye. - Eye examination: Visual acuity (the ability to see the vision chart) and eye pressure (fluid pressure in the eye) are measured. Pupils and eye movements are examined. The structures inside the eye are examined through a microscope. The lens and retina (back of the eye) are examined after drops have been placed in the eyes to widen the pupils. The retina is examined with an ophthalmoscope (instrument with a strong light and magnifying lens). - Blood drawing: Blood samples are drawn through a needle in the arm to test for the level of sex hormones. - Conjunctival swab and tear fluid collection: A small sample of tears may be collected in a small tube to study their consistency and makeup. The top layer of cells from the surface of one eye may be removed with a swab or filter paper for study.